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The water in the aquarium smells like a swamp

maintenance, care, compatibility

With the help of an aquarium your home will be filled with beauty, comfort and warmth of exotic reservoirs. Aquarium is a great place to observe beautiful fish and calm meditation.

However, a damaged tank can ruin both your mood and the health of its inhabitants. Sometimes the water goes out and it stinks like a swamp. Muddy water spoils the impression, and makes the nursery unfit for further use.

The problem requires an immediate solution, which involves finding out the cause and its immediate elimination.

If the aquarium fluid has become rotten, which has strongly started to smell, and even smells like a swamp, it is possible to establish the causes of the imbalance of the aquatic environment through practice and observation. In the course of the research, it will be possible to determine the method by which turbid water, which goes dead and smells unpleasant, will be neutralized.

To solve the problem should be phased actions.

  1. Decide whether you chose the right fish food. To do this, change the water, buy another, better food and test it in a few days. After a day, a turbid liquid that smells like a swamp has disappeared and is clean, odorless, which means the cause of the problem was unsuitable food. In the case where the action did not lead to a result, other reasons should be sought.
  2. It so happens that you feed the fish and other animals with high-quality feed, but the aquatic environment is still muddy and “gives” the swamp. Probably, you overfeed the inhabitants of the nursery, and they do not have time to eat all the granules. Not all fish eat a lot, so arrange unloading diets for them and add less feed to the water. After a few days, smell the tank – if the unpleasant smell has disappeared. If yes, then you have found the reason. The uneaten food is mixed with the soil, decomposing.

Watch a video on how to feed the fish properly.

If you are a beginner aquarist and for the first time launched an aquarium, due to lack of experience you could create the wrong neighborhood in the nursery. It turns out that not all types of fish, snails, amphibians and reptiles get along together. Some will disturb others, and because of close space, someone will fall ill and die, quietly sinking to the bottom.

Due to severe stress, insufficient shelters and swimming places, the inhabitants of the reservoir excrete feces with a characteristic aroma. After a day or two, muddy water will appear with a stench.

What to do – get a spacious tank, pour water into it with suitable parameters, and populate compatible pets there. Or buy two aquariums at once, if many species are incompatible within the same space.

Also carefully inspect the bottom – maybe one of the fish died, and the body is still not removed.

  • Wrong decorations can “decorate” the aquarium with an unpleasant smell. This is not a perfume, but a living growth, it has its own life. In this case, contact a specialist (a seller in a store or a botanist), and ask whether the purchased plant is able to secrete flavored vapors. Specify the size of the tank capacity, type of soil and water parameters. Replant the plant in the right environment – it may need a larger or smaller aquarium.
  • When the fish behave excessively actively, they try to lie to the bottom – the reason for the incorrect supply of oxygen, impaired work of aeration. To fix the equipment, you must:
    • install a compressor with high power;
    • replace the filter with a new one, with a forced circulation system;
    • Ask a specialist how to adjust the oxygen supply to an acceptable level.

    See how to replace the water and clean the soil in the aquarium.

    In the aquarium, the liquid is rotting and the marsh stinks – how to clean the water?

    Beautiful and harmoniously located in the room aquarium can be a decoration for any interior. Aquarium – a great way to relax and achieve internal balance.

    However, the fish themselves and their house need constant and competent care. Beginners and even experienced aquarists often encounter undesirable and unpleasant situations that are the result of improper or inadequate care.

    One of these situations is when the water in the aquarium smells unpleasant.

    Let’s try to find out why aquarium water smells, and what actions you can take to eliminate unwanted odors from the aquarium.

    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).

    The disturbed biological balance of the aquatic environment quickly deteriorates the health of living beings living in it. There are good recommendations that are suitable for aquariums with small fish, where the water is green, and the plants are not planted deep in the ground. To prevent the fish from getting sick, the following procedures should be performed:

    • send pets to other aquariums or tanks with clean water and similar composition of water; make sure the fish do not get sick;


    • transplant plants into other containers, adding methylene blue to them – the dose can be found on the package;
    • clean the aquarium from the old soil, and buy a new one, treat it from parasites;
    • dispose of green water (pour it into drains);
    • empty container should be washed, filled with new water, adding to it 1-2 teaspoons of soda, which will create alkali;
    • leave the aquarium with soda for 24 hours;
    • re-boil the aquarium snags, the grottoes and artificial decorations can be transplanted into the aquarium with soda, after treatment, rinse everything in running water;
    • After the procedure, you can start the aquarium again.

    The causes of muddy water in an aquarium can be varied, and it is not as easy to deal with them as it seems at first glance.

    1. Turbidity can occur due to swimming in the pond of small particles of algae, solid organics and cyanobacteria. There is another unobtrusive reason – poor washing of the aquarium soil and inaccurate pouring water from a clean tank. This type of turbidity does not threaten the water and the fish, you can do nothing with it. After some time, the muddy part of the water will settle, or seep into the filter, remaining there. The formation of turbidity can provoke fish who love to plow the ground, but these actions for the reservoir are completely harmless.


    1. Turbid water in an aquarium can be caused by cichlids, goldfish and tail finch fish – their active movement in a reservoir is the cause of the resulting turbidity. If a filter is not installed in the tank, it will be difficult to clean the water.
    2. Often, muddy water appears after the first start of the aquarium, after the fresh water inlet. Nothing to do, in a day or two the sediment will fall to the ground and disappear. The mistake of novice aquarists is a partial or complete renewal of water, which is considered a gross error. When adding new water to a newly launched aquarium, the bacteria will become even more! If the aquarium is small, you can install a sponge filter that quickly cleans the pond.

    Watch the video about the device and the operation of the internal filter.

    1. Malicious bacteria in an aquarium can also be causes of turbidity. When the water becomes green, then it’s time to draw conclusions – this is an unnatural color. Muddy and green water is formed due to overcrowding of the aquarium with fish or plants. That is, the aquarium fluid passes through the filter, but is not cleaned. The abundance of metabolic products provokes the formation of putrefactive microorganisms, ciliates and other unicellular. If ciliates are beneficial, the bacteria can harm the plants – they will start to rot. In order not to be surprised why fish and plants often get sick – watch the aquarium clean and tidy.

    1. Why still breed single-celled? Because you do not have time to clean the tank after heavy feeding. For aquarism it is better to underfeed than to feed. This rule will protect the fish from problems. After overfeeding again the water got cloudy – what to do? Arrange a pet unloading diet for a couple of days, the bacteria will die out, the water biobalance will be restored.

    1. Incorrectly installed decoration. Snags, plastic materials of poor quality dissolve in water, forming a muddy shade. If the scenery is new wooden, but untreated – they can be boiled or infused in salt solution. Plastic snags should be replaced with new ones.
    2. In the old, stagnant nursery with fish, sediment is formed due to “whiteness after fish treatment”, this is when drugs and purification chemistry for aquarium glass were used in the pond. Such substances have a number of side effects, they disrupt the biological equilibrium, neutralizing the favorable microflora.

    Now we know the reasons why the water grows cloudy in the aquarium, and what to do in each case. However, there are general rules, without which it is impossible to completely eliminate the problem.

    1. Siphonte the ground in the aquarium. Open the filter, rinse and clean. Then add activated carbon to it – this needs to be done to absorb harmful substances. It is forbidden to make a complete replacement of water and washing the aquarium soil, otherwise the beneficial bacteria will die out and will not be able to process rot and algae.

    See how to siphon the soil in the aquarium.

    1. In some cases, it is necessary to do an intensive aeration of the aquarium – when there are a lot of fish feed residues and a fasting day is not enough. Oxygen will quickly remove excess organic matter.
    2. If an unpleasant smell disappears in an aquarium, it means that the struggle with mist is over successfully. Also for elimination of bacterial turbidity it is possible to use elodeya, having landed it superficially in a ground.

    The color of turbidity will tell about the sources of its formation:

    • The water color is greenish – single-celled algae reproduce;
    • Brown water – peat, humic and tannins, poorly processed snags;
    • Milky white color – unicellular bacteria begin to multiply;
    • The color of the water coincides with the color of the soil or of a stone recently laid on it, which means that the soil was plowed by fish, or the stone turned out to be fragile.

    Drugs that prevent the appearance of a cloudy precipitate

    In order to avoid turbid water, it is necessary to control the level of nitrates, nitrites and ammonia. They stand out as a result of the vital activity of fish, plants and improper care of the water body.

    Therefore, fish should be settled in the tank, the size of which corresponds to its volume. Proper feeding of pets, timely cleaning of the products of their vital activity, removal of rotten plants will settle the water balance. If there is no mechanical or biological filter in the aquarium, replace 30% of the water weekly with fresh and sedimented.

    Do not add water from the pipeline with the smell of chlorine or boiled.

    See also: What water to pour into the aquarium with fish?

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