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Green algae in the aquarium how to fight

maintenance, care, compatibility

Algae in an aquarium, how to get rid of and fight with all their species

An algal flash is a visual indication of a violation (absence) of a biobalance in an aquarium. This is the loss of any link in the balance!

Algae – this is not all that grows in the 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 .

Higher flowering plants (as well as several species of moss and ferns) are planted to decorate and revitalize the aquarium, while algae, with the exception of a single species of decorative importance, enter the aquarium without our participation and reproduce in it just when the balance is knocked down and balance is broken. They form a suspension in the water, causing its turbidity or discoloration, or stick around all the surfaces in the form of fluff, bundles and balls of yarn, plaque, mucus and the like.

It is clear that their presence does not contribute to the beauty of the aquarium.

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).

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.

According to its structure, they are closest to higher plants. They form fringing fouling, bunches, balls and strands of thin threads or films of different shades of green color on aquarium glass, soil elements, plants, stones, snags, decorations or a green suspension, from which water becomes cloudy and changes color (the so-called water bloom).

In addition, the appearance of filamentous forms of green is often caused by the lack of macroelements – salts of nitrogen and phosphorus. The growth of higher plants in such cases slows down or stops completely, and the aquarium draws in greenish mud.

When describing the algae divisions, we intentionally described in such detail what conditions the representatives of each of them need in order to breed in an aquarium to a significant amount (there are always a small number of these organisms in the aquarium, but they do not spoil the beauty and do not interfere with other inhabitants). Obviously, in order to cope with the invasion of crimsons, diatoms, or their brethren, these conditions in the aquarium must be changed. And the most important thing is to plant a large number of living higher plants and create conditions under which they can successfully compete with algae and thereby control their numbers.

The following steps will help change the balance of power in favor of the plants.

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

Filamentous algae in an aquarium how to fight-photo description video.

Causes of filamentous algae in the aquarium

Filamentous algae multiply rapidly enough in the aquarium and begin to occupy almost the entire area under the following conditions:

• Bright light. Thread often appears in those aquariums that are exposed to direct sunlight during the day or artificial lighting is used for more than 8 hours per day.

• Insufficient oxygen supply.

• A small number of aquarium plants. The surplus of trace elements coming with fertilizer, with a small number of plants, has a positive effect on the rapid growth of the yarn.

• Irregular replacement of water in the aquarium and its poor cleaning leads to the accumulation of nitrates, which are especially needed for the growth of nitrate.

Often the filament appears at the very beginning of breeding aquarium fish and this is due to the fact that higher plants have not yet had time to settle down, which means there is an excess of trace elements necessary for the growth of protozoa. Sometimes filamentous algae can be brought into the house and together with the plants acquired in pet stores.

Methods of struggle

Filamentous algae will surely appear in the pond if there is an excess content of water-soluble nitrogen and phosphorus compounds. Therefore, first of all you need to pay attention to the operation of the filter and lighting.

The blue light that favors the growth of the thread should be eliminated and replaced with a soft one.

The accumulation of ammonia compounds occurs both when the filter is clogged and when there are too many fish with an insufficient number of plants. Floating plants and such that grow rapidly (hygrophilic, vallisneria) inhibit filamentous algae, taking away their food.

Of great importance is the concentration of iron in the aquarium. It should not exceed the permissible dose of 0.2 mg / l.

Removing the algae from the aquarium with your hands, for example when settling in Spirogira, is almost the only method of control. It is very important to clean the plants from the floss and wash them, and take CO2 to the aquarium only during the daytime.

For all cleaning activities, many recommend to darken the aquarium for three days.

In some cases, the use of algaecides, such as, for example, Sidex, containing glutaraldehyde, is very effective. Hydrogen peroxide in an amount of from 6 to 10 mg / l and the filament are also incompatible.

Do not neglect the biological methods of destruction of algae parasites. Who eats yarn, so it is catfish, gastromysones, viviparous small fish, pesilias and mollies, as well as karzuby, jordanelles, Siamese epalceorinhoses.

They grow very well in water with increased hardness. The well-known famous blooming of water in swamps and artificial reservoirs is due to filamentous algae.

Unlike other aquatic plants, they have a specific sugary smell and a salty taste. I think that a normal person will not taste the swamp mud.

We believe experts that the taste of Tina is sharp and astringent. Filamentous algae live in all water bodies where there is no strong current.

The chemical composition of scientists is not fully understood.

What is dangerous filamentous algae

Filamentous algae are different clusters of fairly long or short filaments. Separate beams can be formed from them, fine algae are perfectly attached to the bark, entwining higher aquarium plants, filter tubes and other equipment.

The color of these algae is most often green, but protozoa can also occur with a brown, black, gray and even reddish color. A small amount of filamentous algae is considered a normal phenomenon, and it indicates that it is more likely that breeding conditions in the aquarium are suitable for other plants.

But a huge number of filamentous growths can bring a lot of problems, and, above all, they include: Isolation of toxic substances by the remains of algae, which are detrimental to the inhabitants of the aquarium. The natural death of a large number of filamentous algae leads to a continuous process of their decomposition, as a result of which toxins are released.

Algae strands entangle the plants growing in the aquarium and thus interfere with their growth and development.

The algae retain the remnants of food and other organic matter, and this leads to rapid contamination of all the water in the aquarium. In bundles of filamentous algae, small fish and fry may become entangled.

In connection with these problems, it is always necessary to fight fast-growing filamentous algae in an aquarium, and both the simplest methods and certain professional techniques can help.

“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.

“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”.



Algae in the aquarium are a sign of an established biobalance. They appear on plants, stones, glass walls, and even on equipment. However, their rapid growth means that fundamental changes are taking place in the aquatic environment.

In an aquarium where there are a lot of plants, algae will not appear in large quantities. Good aeration and water filtration will stop their growth. Timely removal of food residue and dirt contributes to the purity of water.

If you notice that brown formations appear in the reservoir, it means that brown algae have settled in it. How to get rid of kelp and suspend their reproduction?

The origin of brown algae, symptoms of formation

Brown algae are representatives of the Diatoms Division (Bacillariophyta). They should not be confused with sea kelp (Phaeophyta), which includes kelp seaweed.

In an aquarium, these algae do more harm than good, and you need to fight them.

Diatoms form brown dust on the walls of the tank. It appears everywhere – and on the ground, and on snags, and on the filter, and on the glass, even on the leaves of plants.

Initially, the formation is almost imperceptible, but later it acquires a dark, saturated shade.

At the initial stage, this type of algae is easily removed with a scraper, even crushed from plants. If you dash through the decoration, then many dust-like particles will fall from it.

Dust can be wiped off with a regular cloth moistened with running water, but without the use of detergents and soap.

Watch a useful video on how to deal with diatoms.

But in a neglected reservoir, the struggle with diatoms will be difficult. Brown particles turn black, grow rapidly, forming a buildup on all surfaces.

The top layer is crushed, and the bottom remains. This is reminiscent of the ground surface, with brown algae almost invisible through the front glass.

The problem is that such diatoms negatively affect the health of plants and fish. Plants can not carry out photosynthesis, almost “suffocate”, and the fish do not get enough water from the water, they can get poisoned.

If you do not deal with the problem in a timely manner, the consequences will be disastrous for all living creatures.

How to get rid of green algae in an aquarium :: how to deal with greens in an aquarium :: Care and nurture

Many aquarists at least once, but faced the problem of fouling the aquarium with green algae. They easily adapt to different conditions and grow quickly.

The sooner you start fighting them, the sooner you get rid of them.

The question “How does a little girl retrain to go to the tray (she is 4 months old)? “- 3 answers

1. The most effective means of combating green algae is to reduce daylight hours to 6-8 hours. Also should reduce the brightness of the illuminating lamps.

2 Seaweed they do not like being touched or moved. It is therefore necessary as education to collect them siphon or wound on a stick. Increase the filter capacity so that a strong stream of water prevents the algae from settling.

On the contrary, aeration should be reduced. Seaweed do not like a small amount of oxygen in the water.

Also launch the plants floating on the surface of the aquarium – they will shade the algae.

3. Once you notice the green algae, change the water change mode to aquarium. Try to change 10-20% of water daily.

So you will not let algae get used to the aquarium environment.

4. Pet shops sell special products for the prevention and control of green algae. But carefully read the label – they are harmful to some types of aquarium plants. Chemicals do not eliminate the cause of algae.

They eliminate only the visible greens, but disputes still remain. If you need an emergency method of dealing with green algae, then these drugs are just for you.

After these funds, conduct the above methods for a week for prevention.

If you can’t get rid of green algae, then as a cardinal method you can re-launch the aquarium. To do this, prepare a new distilled water.

Wash the aquarium and all accessories with chlorine.

Some species of fish (catfish, mollies) eat green algae. They will save you from the greenery in those places where you find it difficult to reach.

Snails that feed on algae and food debris can be an alternative to fish.
Before planting new plants in the aquarium, be sure to wash them in a special solution. It is prepared using a 5% bleach solution, which must be diluted with water at a ratio of 1:20.

Have you ever heard that the water in the aquarium bloomed or turned green, and very quickly. What to do in this case?

First, you need to find out the reason, and second, learn how to deal with it.

Why is the water in the aquarium green? The reason is as follows: when blue-green algae reproduce, or euglena, to wait for the landscaping of the water.

You should know that these algae are single-celled and they float on the surface of the water in the form of an invisible film. Euglena is an important part of the food chain of the underwater world, and under the necessary conditions (reduction of nutrients, carbon dioxide and oxygen, a wide range of temperature conditions), it is rapidly multiplying. It is not so easy to get rid of the flowering of water, given its sudden flashes.

With strong light (green algae love it), with frequent renewal of water using chemicals, the biological filtration system of aquarium water gets lost, as a result of which euglena multiplies and grows.

How green algae appear in water – additional reasons

Blue-green algae like long-lasting lighting, more than 10-12 hours a day. This is another reason why the reservoir blooms. When you start a new aquarium, you should light it gradually, starting from 4 hours a day, increasing the number of daylight hours to 10 hours.

Also, do not forget that with an excess of fertilizers for plants, the amount of phosphorus decreases. Plants grow poorly, and the water begins to turn green. That is why it is necessary to eliminate all the errors that are allowed during the maintenance of the aquarium:

  • When starting the aquarium, the illumination is set up incorrectly, a large number of plants are planted;

Watch the video story about aquarium lighting.

  • Frequent tank maintenance (water renewal, cleaning, aeration);
  • Enhanced feeding of fish;
  • High water temperature in the tank;
  • Reverse cases – a rare care for the aquarium – not enough aeration, fresh water, no compressor.

Why is water blooming not a sentence? If you know the main thing that “greens” causes ammonia released by algae, everything will quickly fall into place.

New, recently launched aquariums are sometimes not serviced correctly, which causes an incorrect nitrogen cycle. The first outbreak of euglena can lead to the fact that it will be difficult to get rid of it forever.

To regulate the nitrogen cycle when starting the aquarium, turn on the light for only a couple of hours for 30 days, use “old” water from the old aquarium and the used filter cartridge. This normalizes the nitrogen cycle.

There are more ways to get rid of algae. What to do:

  • Use an ultraviolet sterilizer to help neutralize euglen. Once turned on, it will destroy algae cells with ultraviolet light.

See how to choose the right UV sterilizer.

  • Install a diatom filter – an effective way when dealing with green algae.

  • Turn off the light in time. This method controls the appearance of “green” water, and will save time and money on additional equipment. Cover the aquarium on time. Feed the fish and other inhabitants of the aquarium for 7 hours of daylight. Healthy plants can live in water for about a week without using light. After the procedure, you can change 30% of the water to fresh.
  • The use of coagulants – small particles in a mechanical filter that removes flowering from a water tank.
  • Destroys the blue-green algae granular activated carbon added to the filter. In the process of “treatment” the filter can be cleaned 1-2 times a week.
  • The use of micro cartridges also blocks outbreaks of flowering.
  • In certain cases, combine these methods while simultaneously applying filters and ultraviolet (as an example).

How to get rid of the brown algae in the aquarium :: brown algae in the aquarium how to fight :: Aquarium fish

Tip 1: How to get rid of the brown algae in the aquarium

Sometimes walls, plants, soil and other accessories in the aquarium are covered with brown bloom. This is not only extremely aesthetic, but also dangerous for aquarium inhabitants.

If a similar situation has arisen, then measures must be taken urgently. The enemy of the aquarium is brown algae.

These are multicellular organisms that appear in the wrong light and an excess of organic matter.

The question “opened a pet store. Business is not going. What to do? “- 2 answers

  • Lighting aquarium, cultured algae, special chemicals against brown algae, a few catfish-tototsklyusov.

1. To combat brown algae, you first need to know the reasons for their appearance. Poor lighting, high nitrate levels in the water, high pH levels, too low carbon dioxide levels can all lead to the appearance of brown algae.

2. Oddly enough, higher plants, that is, cultivated algae, specially planted in an aquarium, can become helpers in the fight against brown algae. They will absorb all the nutrients dissolved in water and brown algae will not get anything.

3. To combat the aquarium enemy, it is necessary to use fast-growing plants effectively, you need to plant the entire area of ​​the aquarium rather thickly. It is necessary to create the right lighting for better plant growth, the light day should be about ten hours.

4. It is necessary to reduce the content of organic matter in the aquarium. To do this, it is important to regularly replace part of the volume of water and reduce the amount of feed.

Pets should eat all the food in about two minutes, the rest – the surplus.

5. It is extremely useful to settle a few catfish into an aquarium. They love to eat brown algae, and they are happy to help get rid of them.

Five sotomy-otsinklyusov able to maintain order in an aquarium of one hundred liters.

6. An emergency measure in the fight against brown algae may be the use of special chemicals. However, it is worth remembering that their effectiveness is temporary. Such chemicals are sold at the pet store.

A consultant can help you find the best option. There are also special conditioners for water, they accelerate the growth of cultivated aquarium plants and improve their appearance.

The aquarium is a closed biosystem in which not only fish and plants are present, but also hundreds of species of bacteria and unicellular organisms. This list also has microscopic algae.

They multiply under certain conditions and in large quantities. The fact is that they greatly spoil the appearance of the aquarium and change the habitat in it.

1. Can often be observed on the glass aquarium green plaque seaweed. It is usually harmless if reproduction has not happened too much. To remove it, simply clean the aquarium glass using a scraper.

If you need to destroy the excess seaweed, it’s enough to let fish eat in the aquarium. You can also temporarily dim the aquarium or make too bright artificial lighting.

2. If brown algae appears, this is a sign that there is not enough light. They usually appear in the winter when artificial lighting is not enough.

In the spring, they disappear by themselves. To combat such algae, you can use a scraper.

Cleaning is necessary a couple of times a week.

3. If an invasion has occurred in your tank seaweed, then it is a natural result of bad conditions. First you need to pay attention to the water.

Reproduction usually occurs in dirty old water, which contains a lot of organic matter, nitrogen, phosphorus compounds, vitamins and trace elements. Rapid growth seaweed may interfere with gas exchange reservoir. Water will also bloom.

As a result, many plants may die.

4. To fight them, first you need to optimize the habitat, remove the affected plants, install filters that have biological fillers. Be sure to provide round the clock aeration in the aquarium. In extreme cases, you can use special chemicals.

They are sold in almost every pet store.

5. If there is an excessive reproduction of brown seaweed, then a characteristic mucous deposit on the surface of leaves and stones will be formed. There are cases when these algae completely tighten the bottom of the aquarium.

For the fight, you can use the antibiotic erythromecin.

Somik-ototsinklyus – is a real “janitor” for the aquarium.

It is easier to deal with brown algae, if you find out the reasons for their appearance.

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