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Green algae in the aquarium

maintenance, care, compatibility

Filamentous algae is a true aquarist nightmare. Barely appeared in the aquarium, these thin green strands, like hair, braiding plants and stones, begin to grow rapidly.

In a matter of days, they can flood the entire room reservoir, and it is very difficult to get rid of them.

Growing, the algae emit an excess amount of waste into the water, entangle plants, interfering with their growth. The algae stuck to the remnants of food, fish fry may get confused.

All this leads to active processes of decay in the aquarium, and if the process is started and nothing is done with it, even lead to the death of the bio-system.

First of all, you need to understand that algae and aquatic plants are completely different things. Plants are higher, complexly organized beings, they have different departments in their structure: root system, stem, leaves, shoots.

Each organ consists of its own type of cells. Algae, lower, protozoa, are much more primitive in structure – they have no division into organs, and they consist of only one kind of cells.

But in these cells complex biochemical processes take place.

Algae are not some kind of harmful parasites, they are a normal member of the aquarium community. To a greater or lesser extent, they are present in every aquarium.

Even the sterilization of all possible does not guarantee that you can get rid of algae. They will get there on the leaves of plants, or simply with tap water, which in the summer may contain spores of simple algae.

Aquarium is a biosystem model, and algae also occupy a niche in it. They are part of natural balance.

Green filamentous alga, to a certain extent, is a competitor of plants. If conditions for plants are optimal, they eat well and grow, there is no excess of nutrients and light, then they suppress the algae. If these conditions are violated in some way – the algae “raise their heads”.

The appearance of an undesirable resident is an alarming signal that the balance in the aquarium is disturbed, and only by restoring it can you reduce the growth of algae and get rid of them, at least from their excessive presence.

“The enemy must be known in person” – this also applies to algae. The fact is that under this name many species are collected, which can often be distinguished only under a microscope.

And to deal with them to be different methods.

Here are the main signs by which it is possible to determine with confidence that these are really green filamentous algae.

  • Appearance: thin green threads.
  • Texture: soft, slimy to the touch. When removed from the water, they immediately lose their shape and sag.

The filament is often referred to as a kladofora, but this is a misconception. The cladophora has a hard, elastic texture that practically does not lose shape in the air.

Green filamentous algae feed and grow due to substances dissolved in water and the process of photosynthesis occurring in the light.

Thin, often very long bright green “strands” that can stray into whole nests. Formed in the vicinity of plants, especially young, which are actively growing.

The difficulty in dealing with spirogyra is that it prefers the same conditions that are good for plants: an adequate amount of nutrients and good light. But a burst of algae growth is usually caused by an overabundance of these factors, even a small one (remember that in optimal conditions, where there is enough, but nothing in abundance, plants will suppress the alga, taking nutrients from it).

The rapid growth of spirogyra occurs in well-established aquariums that are not very well cleaned. In this case, the algal surge can be stimulated by some insignificant, at first glance, event: a dead fish that was not seen in time, for example.

Spirogyra threads are very soft, easily rubbed with fingers. They simply remove mechanically – winding green strands on a rough stick made of wood, a toothbrush, and the remains settled on the bottom – siphon. First of all, it is necessary to carry out exactly mechanical cleaning, removing as much algae as possible.

Then exclude the factors of its active growth: reduce the light (it is better to darken the aquarium completely for 2-3 days, it will not do any harm to the fish and plants, but for algae it will be a serious blow), slightly increase the water temperature. Replace water more often to reduce the concentration of macro-elements in it.

The introduction of the drug bicillin-5 into the aquarium also helps.

There are also natural enemies of this type of algae. She is well eaten by barbs, specials, guppies and other viviparous, shrimps.

Thread (Green Hair Algae, Hair / Thread Algae, Fuzz Algae)

Short bright green filamentous algae, appearing in the form of a gun on the leaves and stalks of plants. The first they occupy plants with long stems.

Oedogonium – the first alarming signal about the lack of food in the aquarium, the poverty of the soil substrate. Under normal conditions, this type of algae is easily replaced by strong plants, but with a lack of nutrition, a burst of growth of the “green gun” is possible.

The main mistake that an aquarist can make when he starts to deal with this type of algae is to encourage water changes without introducing additional nutrition for the plants. To eliminate them, you need to check and, with a deficiency, increase the supply of carbon dioxide, feed the plants with macro-elements.

“Green fluff” will be happy to eat shrimps, mollies, barbs – they will help to fight the scourge, but they will not solve the problem completely.

Chlamydomonas and Chlorella. (Green water, Algae bloom, Green tinted water, Euglaena)

“Water blooms” is called the process of rapid growth of these algae. In summer, this happens in all freshwater bodies: the water becomes muddy, green, and thin green threads float in it.

The reason: the simplest unicellular algae, actively breeding and freely floating in the water.

And if for natural reservoirs it is a part of the natural life process, then for an aquarium it is a real disaster. Most of all these algae harm the plants, shading them and taking food.

Strictly speaking, unicellular algae are not filamentous – they are even more primitive in structure. However, in aquarium terminology, these species are often combined.

The fact is that in the mass single-celled cells can be combined into groups and threads, their texture, growth conditions, damage to the aquarium and methods of control are very similar to filamentous ones.

Flowering water – a sign of over-light and pollution of the aquarium. To cope with this process, it is necessary to shade the aquarium for several days, adjusting at the same time a powerful and smooth operation of the compressor. But even if the algae disappeared from these measures, a water change can cause a new outbreak, and the procedure has to be repeated.

Therefore, the only way would be to use a diatom filter or a UV sterilizer.

Chemical method of dealing with unicellulars – bitsillin-5, penicillin. Well helps ozonation of water.

You can get rid of flowering in a natural way – Daphnia crustaceans feed on algae and clean the water for several days. The only problem with this method – from the aquarium will need to remove the fish that Daphnia happy to eat.

“Algae disaster” will not occur in an aquarium in which the correct balance of life is respected. The appearance of green filamentous algae is, above all, an alarm for the aquarist, indicating the beginning of the inhibition of plants due to an excess of some substances and a shortage of others.

To avoid this, follow the simple recommendations.

  • Regular cleaning and changing the water in the aquarium. If these conditions are not met, a lot of decomposition products, nitrates causing rotting, water damage, and algae accumulate in your indoor pond.
  • Harmonious lighting. Excessive light provokes excessive algae activity. For a good control of this factor, it is necessary, first of all, to establish an aquarium correctly, where direct sunlight will not fall on it. The length of daylight, sufficient for plants and fish – 10-12 hours.
  • A sufficient amount of aquarium plants. Algae often begin to actively proliferate where there are few or no plants, in an aquarium with cichlids, for example. These fish are actively digging the ground, and aquarists often decorate their homes only with artificial decorations. Meanwhile, plants are necessary for the harmonious life of an artificial reservoir, otherwise their place in the bio-system will be occupied by uninvited aliens.
  • Good aeration. A sufficient supply of oxygen is necessary for everyone living in the aquarium. If the plants themselves feel good (and they need oxygen), then they will be able to inhibit the growth of algae.

It is important to remember that algae are equal participants in biological processes taking place in your aquarium. It is not their presence at all that is harmful, but their active growth, an excess of algae.

In a well-balanced aquarium invasion of algae will not happen.

Many experienced aquarists do not protest at all against the visible presence of algae, specifically leaving them in inconspicuous places. In small quantities, they benefit by absorbing some excess nutrients and rotting products.

An important principle of aquarium maintenance is regularity and moderation. Where the fish are fed, not overfeeding and the volume of water is sufficient for them, the plants live and thrive, the dirt is constantly removed, and the water is refreshed and aerated – in a harmonious, well-kept aquarium there is no “environmental catastrophe”.

The nitrogen cycle has not yet been established in newly launched aquariums, and the probability of an algal outburst is especially high in them.

By itself, the appearance of algae in the new aquarium – is normal. In the first 2-10 weeks since the launch of the new aquarium, you can see the rapid growth of brown algae. This happens if the level of nitrates in water exceeds 50 mg per liter.

Filtration and partial replacement of water solve this problem.

As soon as the plants take root and grow, they will take food away from the algae and the growth of the latter will slow down or stop. In a well-established aquarium, there is always a struggle for balance between plants and algae.

Fish that help fight algae in an aquarium:

  • Ancistrus
  • SAE
  • Ototsinklyus
  • Gerinoheylus
  • Brocade pterigoplicht

In addition, the plant snail neretina perfectly cleaned.

Located in most aquariums in the form of green dots or green film. These algae love a lot of light.

Green algae grow only if the amount of light and nitrates exceeds the level that higher plants can absorb. In densely planted aquariums, green algae develop extremely poorly, since higher plants consume nutrients and absorb the light necessary for the rapid growth of green algae.

Without condemning the use of plastic plants in an aquarium, I note that living plants look better and create the conditions for the normal development of the entire biosystem.
However, they can massively develop in aquariums with CO2 systems, due to fluctuations in carbon dioxide levels during the day. An outbreak of green algae growth can occur suddenly, especially when the level of phosphates and nitrates in the water is elevated. Usually they look like green dots covering the surface of the glass and the bottom of the aquarium.

The recommended countermeasures are reducing the amount of light and the length of the day, and mechanical cleaning is done with special brushes or a blade.

Mollies and somas, for example, ancistrus, eat green algae very well, and I keep a few specially for this purpose. The snail neretina also copes well with xenococus and other algae.

Brown algae grows quickly if there is too little light in the aquarium. They look like brown bloom covering everything in the aquarium.

Usually plants loving light are in poor condition or disappear. Plants that tolerate blackout well, such as Javanese moss, pygmy anubias, and other types of anubias, can be covered with brown foil; tough anubias leaves can be rubbed to get rid of brown algae.

Again, aquarium cleaners, antsistrusy or ottsinklyusy will help well. But the simplest solution is to increase the intensity and duration of daylight.

Usually brown algae quickly disappear, one has only to bring the lighting in order.

Brown algae are very often formed in young aquariums with an unsettled balance (younger

3 months), with the wrong spectrum of lamps and with too long daylight. An even greater increase in daylight hours can lead to even worse consequences.

The filament in an aquarium consists of several species – edogonium, spirogyra, kladofora, rhizoclonium. All of them are united in appearance – similar to a thin thread, green balls. This filamentous green alga.

How to deal with the thread in the aquarium? An effective method of control is the use of algaecides – agents that help fight algae in an aquarium, they can be purchased at pet stores. The simplest and most accessible method is manual removal.

As a rule, the threads are quite fragile and easily detach from the surface. Also, some types of floss are happy to eat shrimp, for example, a flock of Amano shrimp can easily clean a large aquarium from floss.

Its appearance and growth depends on the nutrient content of water. This is usually caused by the fact that too much fertilizer has been poured into the aquarium, or there is a substrate in the aquarium, it releases nutrients. And there is nobody to absorb them. In such cases, help replace and fast-growing plants (nyas and elodeya, hornolistnik)

Blue-green algae in an aquarium: how to deal with them

The aquarium should always be kept clean. There are situations when the owners have no time to take care of him and after a while they notice such a serious nuisance as the blue-green algae in the aquarium. They appear for a reason, there are reasons why this may be the case:

  • poor care of the aquarium;
  • excessive warming of the water (rays of the sun, battery, etc.);
  • presence of decomposing organic matter at the bottom;
  • rare change of water;
  • ingress to the aquarium of harmful substances.

Most often, the blue-green algae in the aquarium appear because the owners forget to change the water in time, and a large number of pathogenic bacteria begins to accumulate in it. Those are able to multiply very quickly and destroy the useful flora in aquariums.

It is in this way that blue-greenish deposits appear on the walls, which require immediate action.

If the aquarium is exposed to light and a large amount of solar radiation enters it, it contributes to the rapid growth and reproduction of blue-green or green algae. It is very important that the room in which he stands is well ventilated. But still an important place in this case is precisely the timely cleaning of aquarium deposits and the replacement of water with fresh one.

The lack of oxygen, clean water leads to pollution and as a result can lead to disastrous results – illness or even death of aquarium inhabitants.

Scientists refer to the blue-green algae to the class of bacteria. In appearance, they resemble a mucous carpet on the surface of an artificial reservoir of a dirty brown color. Such living forms have exceptional adaptability and vitality.

If the blue-green alga started up in an aquarium, then it will be difficult to get rid of it.

If you give a precise definition, it is cyanobacteria that appear on the walls of the aquarium when it is exposed to prolonged exposure to direct sunlight, or when the water temperature is higher than is required. Also beneficial to the development of blue-green is a large amount of organic impurities. Such bacteria quickly begin to develop if the aquarium is not regularly cleaned.

Also, the cause of cyanobacteria is a rare change of water in the aquarium.

Blue-green algae is very unpretentious, they have enough minimum conditions for development. These bacteria take all the nutrients necessary for their development and growth out of the water.

They grow not only on the ground, but also on any object that may be at the bottom of the aquarium: stones, snags, shells. The unique ability to restore quickly allows blue-green algae to quickly restore its population.

Therefore, to get rid of them is not so easy.

The peculiarity of these microorganisms living in the aquarium is an unpleasant odor. The greater the surface of the artificial pond covers the blue-green alga, the more polluted the water becomes, and the aquarium itself turns into a decaying puddle.

The detrimental effect of blue-green algae on the artificial microclimate of an aquarium is that they prevent water from dissolving oxygen, increasing the amount of nitrogen in it. Getting rid of such bacteria is not easy.

There is a special way to deal with blue-green algae that every aquarist should know.

The simplest and most common way to deal with blue-green algae is to darken the aquarium. To do this, remove from the aquarium fish, plants, stones and snags, compressor, filters and other equipment.

After that, it is closed from the light for three days. During this time, carbon dioxide ceases to enter into water, which is emitted by blue-green algae.

In the absence of light, such a bacterium will die in three days.

The danger of this method of cleaning is that the soil can remain microscopic particles of such algae, which after a short time will again develop into a huge colony. Blackout aquarium should be combined with disinfection of an artificial reservoir.

Only in this case it is possible to defend more reliably, which helps to further deal with the problem.

Successful wrestling involves disinfecting aquarium equipment from blue-green algae. It must be thoroughly boiled, so that the smallest residues of cyanobacteria are destroyed.

To completely remove the blue-green algae and plants in the aquarium, you need to put them in a weak solution of potassium permanganate for at least half an hour. Then the aquarium vegetation is washed in running water and transplanted into clean water.

Themselves fish, snails, mollusks and all other living organisms living in the aquarium, are also deposited in the settled water for several days. Having arranged such a quarantine to all living things in an aquarium, you can clean it well from microorganisms. In the reservoir of the net, the remains of blue-green algae are caught.

After that you need to handle the soil of an artificial reservoir with the help of a compressor. It is necessary to siphon soil so that it is enriched with oxygen.

Remote living organisms in the form of fish, newts, snails, plants and accessories begin to return to the cleaned tank. First, they are planted in the ground from the quarantine capacity of the plant. They must acclimatize during the day.

Therefore, they should be left in the tank for a day.

Such a daily quarantine in the aquarium itself allows you to make sure that you managed to get rid of the blue-green algae on the plants. During planting and acclimatization of aquatic plants, it is necessary to protect the artificial reservoir from direct sunlight in order not to create a favorable environment for these microorganisms.

A day later, a fireplace, shells and other accessories return to the glass pond, allowing you to create the desired design. They are also left for a day to check whether cyanobacteria are left on their surface.

Only after daily checking of such accessories can you run fish and other inhabitants of the underwater environment at the last stage.

See how to effectively clean the walls of the aquarium from the blue-green algae.

The advantages of combining the method of darkening and adding peroxide to water

Using the technique of darkening and adding hydrogen peroxide to aquarium water allows for a good cleaning of its walls from blue-green algae. Using the combined disinfection of an artificial reservoir will help save it from cyanobacterial infection.

In general, the most effective means of combating blue-green algae is the prevention and regular cleaning of an artificial reservoir. This will avoid the accumulation of organic sediments in the soil of the aquarium, from which cyanobacteria will be fed.

You must also ensure that the walls of the tank did not fall into direct sunlight. In general, the lighting of an artificial reservoir should be moderate.

It is also necessary to ensure that water does not accumulate a lot of carbon dioxide, and oxygen is regularly supplied to the aquarium water.

You also need to clean live food before giving it to underwater inhabitants. This will help to reduce the sources of pollution of the artificial reservoir. All this will help avoid the appearance of blue-green algae in your tank.

Compliance with the rules of hygiene will reliably protect against dangerous microorganisms that create a nutrient medium in the aquarium for blue-green algae.

Most novice aquarists for some reason believe that plants for the underwater realm bring only additional worries and troubles to the owners. But this is a serious misconception that we will try to dispel in this article.

We will present you the popular algae for the aquarium. The photo and name of the plant you like will help you make the right choice for your pond.

Now there are many very different plants for the underwater kingdom. There are among them those that really care is not easy.

But along with them there are plants that do not require special care.

Algae for an aquarium are the simplest plants, although sometimes they belong to the kingdom of protists (Protista). Blue-green algae even belong to the bacteria.

They can range in size from single-celled microscopic organisms to 70-meter grass.

These are the most ancient inhabitants of the Earth who carried out the first photosynthesis more than three and a half billion years ago. Algae can breed in all water bodies: with salty, fresh, clean, turbid, fast flowing or stagnant water.

For the life of underwater inhabitants are important algae in the aquarium. Species, which we present below, perform several important functions.

They create a special aquarium biosystem, purify water from harmful substances, serve as a natural interior and “maternity home” for fry, fish, snails, shrimps, additional food for many underwater inhabitants, and finally just decorate the house: with them your home water will look natural and aesthetic .

Often experienced fish lovers achieve amazing biological balance with the help of plants in an aquarium. They even eliminate the need for water filtration and mechanical aeration.

True, to accomplish this, it is necessary to know algae well for an aquarium. Photos and the name of these plants are often published in special editions for beginners observing the underwater world.

This species forms a rather dense layer covering the soil and plants. Blue-green algae in the aquarium develop due to excessive lighting. Promotes their appearance and high levels of phosphates and nitrates.

Blue algae in the aquarium are able to release substances harmful to fish. Even algae often refuse to eat them because of bad taste. Ampoulaia will be able to slow down their growth, but one should not hope for them.

In this case, you need serious treatment.

It is necessary to completely turn off the lighting and darken the aquarium for a week, combining this with massive water changes.

These algae indicate that the amount of organic waste in the aquarium has increased dramatically, which serve as food for the beard. These algae are often located on the plants and the walls of the aquarium.

It is a thick, disgusting-looking black carpet. How to deal with it?

The first step is to reduce the level of organic matter. After cleaning the soil, changing the water and filtering it, the growth of the black beard slows down. In addition, this species settles in places with a strong flow: on the surface of filters, on their tubes.

The current provides the beard with abundant nutrition, organic debris is deposited on its surface. Therefore, we recommend to reduce aeration in the aquarium.

To reduce the nutrients in the water, in addition to cleaning, should be planted fast-growing plant species: nayas, elodeyu.

Perennial algae floating on the surface of the water, because it does not have a root system. When the water temperature drops, it sinks to the depth of the aquarium and slows growth. The stems of the plant are long, the leaves are needle-like and very small.

This species is ideal for aquariums, as it is an ideal hiding place for fry. In the leaves of this seaweed, the young will not find large fish, on the leaves there are microorganisms that will become food for the fry.

Rogovists can be used as a spawning substrate. Fishes will lay eggs on it, which will firmly stick to needle-like leaves.

It is better to immerse a hornberry in a moderately warm or cold aquarium, with normal water hardness and neutral pH. This view requires good lighting, so it is allowed daylight more than twelve hours a day.

This seaweed belongs to the cladoforic family. Ornamental plant for freshwater aquariums.

Its structure is a colony of green filamentous algae, intertwining and forming a dense ball. Homeland of this plant – Japan.

Under natural conditions it grows to ten centimeters, in an aquarium it does not exceed six centimeters in length.

In the aquarium the balls are placed on the bottom, and they themselves are attached to the substrate. In the morning, Kladofora emits oxygen. Air bubbles appear inside the ball, it becomes light, almost weightless, and floats to the surface.

In the evening, the oxygen becomes much less, and the ball again sinks to the very bottom.

Marimo can only be kept in cool water at a temperature not exceeding +20 ° C. At higher temperatures, the shape of the tuber is deformed, the ball breaks into small fragments.

Lighting for this species is allowed moderate, daylight – at least ten hours.

Algae in the aquarium, the photos of which you see below, cannot live without light – without it, the process of photosynthesis is impossible. Features of lighting are individual.

They depend on how you grow algae in an aquarium. Plant types can be divided into two categories.

Among them are very light-requiring and requiring moderate lighting.

All plants can be divided into separate groups:

  • floating on the surface of the water;
  • mounted in the ground.

Often, novice lovers do not know the names of algae for the aquarium, but they notice them everywhere: on gravel and sand, plants and stones, equipment and walls. This is normal because algae are part of the balance of the reservoir, but only if they do not develop excessively.

In a balanced aquarium, there must be clear, well-cleaned, stirred water and perfectly clean glass, although many owners prefer not to clean all the walls: they leave the rear glass covered with fouling. Noticed: algae on the walls of the aquarium or on the stones absorb nitrates and many decay products, thereby reducing the growth of algae on the side and front windows.

In addition, some species of fish feed on the back wall, for example, all types of mail catfish.

Some types of algae are especially common and cause a lot of problems for aquarium owners. Here are some of them.

They are in the form of long filaments of green color and grow from the stems and leaves of plants up. This view needs a lot of light. The “strings”, how often these algae are called aquarists, can be disastrous, since they consume a lot of the nutrients that ornamental plants need.

You can control their development and growth by cleaning them manually or using fish that feed on algae with pleasure.


Not all green algae in an aquarium are parasites: some of them belong to decorative species (for example, sparkle). The reasons for the appearance of malicious green Aquarius becomes excessive lighting and a sufficient amount of nutrients in the water.

They harm higher plants because they shade them and absorb nitrates and phosphates intended for them. In addition, this species changes the gas balance of water, which leads to a violation of biological equilibrium. In order to overcome this lower vegetation, it is necessary to resort to the following methods:

1. Lighting. It is necessary to change the light mode.

It is necessary to reduce the intensity and duration of both natural and artificial lighting.

2. Water change. In order to remedy the situation, it is necessary to regularly change the water, as well as clean the soil.

It should be done daily, otherwise the situation will only get worse, since clean water can only increase the reproduction of green algae. This method is best used in the case when the minimum number of fish in the aquarium.

3. Ozonation of water. It is necessary to create a strong current of water using a centrifugal pump, and apply a strong oxidizing agent, namely ozone.

With the systematic use of ozone will give good results: soon the flowering of water will stop, and the biological balance will return to normal.


Seaweed – this is not all that grows in water. So called lower, primitive photosynthetic organisms, often consisting of a single cell or several cells collected in colonies or filaments. They live everywhere in the aquatic environment.

They are distinguished from higher plants by the absence of developed organs: stems, leaves, flowers, and also the fact that throughout their history they lived exclusively in water, while the plants were formed on land, and only after that some of them returned to the water .

Why do algae sometimes capture an aquarium?

The laws of nature are such that living organisms settle everywhere where suitable conditions exist for them. The main thing you need to live algae:

Obviously, all this is in any aquarium.

Algae compete with flowering plants for light and macronutrients. Since the latter are more complex and highly organized, in favorable conditions they triumph in this competitive struggle, restraining the growth of their more primitive microscopic ancestors, taking away their nourishment.

However, they are older, smarter, more hardy, patient and less demanding. These, of course, are not properties of their character, but features of biology.

Algae can form various types of spores and other structures that can survive adverse times, they need to illuminate a different spectrum, they have other, faster ways of reproduction. And if the conditions in the aquarium are not ideal for higher flora, there will certainly be purple, diatoms or cyanobacteria, which will not delay to take advantage of this.

There are several sections of algae with different colors depending on the pigments they contain. Next, we describe how the representatives of different departments in the aquarium look and what conditions cause outbursts of their numbers.

Diatoms are unicellular organisms that have a silicon shell in the form of a box, many of which are capable of movement. The significance of diatoms in natural marine ecosystems is simply colossal, since they constitute a significant proportion of plankton and form a huge part of the organic matter of the earth (about a quarter), and their shells after dying are the basis of sedimentary rocks.

But in artificial reservoirs they, like their counterparts from other departments of lower plants, are unwanted guests. Brownish or brown algae in an aquarium, forming a slimy coating, especially in poorly lit places, often near the bottom – these are, as a rule, diatoms. (By the word “brown” – we mean only color, not systematic belonging, since Brown Alga proper is a separate department of highly developed marine organisms with large bodies, thallus).

The development of a certain amount of diatoms almost always occurs in the first weeks after the launch of a new aquarium. In long-running aquariums, diatoms appear in conditions of insufficient – weak and short-term – illumination or light of the wrong spectrum, without a blue and red maximum.

Their reproduction contributes to a pH above 7.5, high water hardness and a high concentration of nitrogen compounds. An outbreak of diatoms can cause an excess of sodium in water, which occurs, for example, after treating fish in a common aquarium by adding salt.

Diatoms (brown) algae in the aquarium PHOTO

Black beard

This type of algae (although several species are meant by this name) is one of the most disliked aquarists because it is very difficult to fight. At first, these algae cover the edges of slow-growing plants, like Anubias, or grow in small bunches.

Then they cover all the plants in the aquarium, giving it an ugly look. For fish they are not dangerous.

Mechanically remove these algae is almost impossible. Blackout or chemistry with them, in principle, can be fought, but then they will grow back.

Some fish (siamese algae eater, for example) allegedly eat it, but on the condition that they are no longer fed.

black beard photo

Other algae species (filamentous, etc.)

These algae are of many species (hair algae, thread algae – filamentous algae, etc.). Hair algae, bright green color, grows on bunches of a ground, stones, etc. Easily removed mechanically or eaten by algae fish.

Thread algae, dark in color, grows in individual long threads. It is easily removed mechanically and usually serves as an indicator of excess iron in water (0.1-0.2 mg / l).

Algae growing on small islands on glass are considered normal for a plant aquarium and are easily controlled by scraping (be careful if you have a Plexiglas aquarium) using a razor or a special scraper. Usually this should be done on the front glass.

Fish, such as antsistrusy, etc., will help keep the glass clean.

filamentous algae photo

What are the chemical means of struggle and how are they bad

There are several chemical agents for algae control. Most of them are adapted from fish farming, where you have to struggle with overgrowing ponds.

An example is simazine, which is available under various brands for aquariums.

Unfortunately, these drugs act on different algae in different ways and are not always effective. In addition, these drugs have a negative effect on plants, causing the death of some plants.

Such as kabomba or vallinsneria, in the case of using simazin, which affects the process of photosynthesis.

The main disadvantage of these drugs is that they do not eliminate the causes of the appearance of algae (excess nutrients for algae in the water) and, accordingly, they will appear again from the spores. The use of these preparations can be recommended, as the last available remedy, in cases when it is necessary to quickly get rid of the algae and then continue the fight in a biological way, as described below.

Other ways are disinfecting plants in bleach. Some use hydrogen peroxide to control certain types of algae.

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Natural composition in an aquarium Using plants, stones, gravel, snags and background in a single ...

Nano-aquarium – arrangement, launch, maintenance

Fashionable now the prefix “nano” is now used in aquarism. And not just used, but ...

My first acquaintance with the company DIAMIX and its product for aquariums

Good day, dear colleagues. In today’s article I would like to tell you how I ...

Psevdomorskogo aquarium: rules design and care for him

If the interior design of your home is based on unusual and non-standard lines, what ...

Handbook aquarist – Sergey Ermolaev

Good afternoon, dear readers! Today I decided to distract from writing articles about aquarium fish ...

Diagnosing Aquarium Fish Disease – A Short Guide

Good day, dear colleagues. We continue to study the most common questions on aquarism, in ...

Unforgettable Aquarium Design for Maze Fish

Labyrinth, or as they are called – Anabasovye, can breathe not only oxygen like other ...

Spawning behavior of cichlids: facts and assumptions

Quite often, one can hear from aquarists of various stripes that all cichlids, without exception, ...

Unusual design catfish aquarium – everyone will do it!

Hello, friends! Somiki are an indispensable attribute of almost any aquarium. Quite often, you can ...

How important is oxygen in an aquarium and how to ensure it biotope

Good day, dear colleagues. glad to welcome you again on my blog. Today I want ...

Create an aquarium design for cichlids in the home pond

Hello, dear colleagues. I am glad to welcome you again on my blog and today ...

Aquaria in Brazil – Fisheries

Dear colleagues! Today I will not talk about aquarium fish or plants. This post will ...

What is Paludarium and how to equip it at home

Hello, dear subscribers and readers Aquablog. The topic of today’s article will be called “Paludarium”. ...