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How often should I change the water in the aquarium

maintenance, care, compatibility

The question of the frequency of changing (or changing) aquarium water very often causes controversy both between amateurs of the aquarium business and in the community of professionals. For everyone, however, it is completely obvious that the chemical composition and balance of the aquatic environment is very important for fish and other animals.

Consequently, substitution should not dramatically change the conditions of their usual existence.

Full replacement is done in exceptional cases, and for this there must be good reasons, namely:

  • progressive water bloom caused by the rapid growth of green algae;
  • the appearance of fungal mucus on the walls of the aquarium and decorative elements;
  • severe contamination and acidification of the soil substrate;
  • infectious disease of fish or plants, caused by the introduction of infections into the aquatic system.

Full replacement of the aquatic environment is almost always a negative impact on the aquarium living creatures.

The fact is that in fresh water it falls into the atmosphere of an unformed ecosystem. In addition, even despite the preparation of new water, its parameters will still be different from the usual.

It should be understood that such a replacement always leads to a strong stress of ornamental fish until they die. Vegetation also responds to new conditions: leaves of plants can turn white after moving to fresh water.

Thus, a complete replacement is a restart of the aquarium, when the creation of an ecosystem begins anew.

Replace the water in the aquarium is necessary. Partially.

And here specialists have almost no disagreements. Although there are owners of domestic water bodies, who argue that the aquarium can work for years with the same water.

It is believed that an ideal balance can be achieved when fish, plants, technical devices for filtering and maintaining water quality work in concert, creating a balanced ecosystem that is as close as possible to natural conditions.

Indeed, there is information that some owners of ornamental fish do not produce substitutions for years. But if you carefully read the data, it turns out that we are talking about sparsely populated aquariums, where the waste of guests is quite insignificant.

In all other cases, it is necessary to replace the water, since a completely closed environment does not live long. In nature, you can not find a reservoir where there would be no flow and at least a partial renewal of water.

Otherwise, the reservoir degrades and dies.

What is the meaning of the substitution? In simple terms, it mimics the natural environment where there is water circulation. Even the most insignificant.

The fact is that in an artificial reservoir harmful substances are inevitably formed – toxins and nitrates, which appear in the process of life activity of living beings and plants. The decrease in the concentration of such substances in the aquarium is what the main meaning of the partial substitution is.

It is necessary to note that if, for example, 1/5 or even ¼ of the old water is replaced with fresh water, the balance of the established ecological environment will be partially disturbed. But these violations are not critical.

It will take one or two days, and the balance will recover by itself.

Replacing half the volume of the aquarium ecosystem will process much longer. It will take 2 weeks until the lost balance is restored, and during this time some fish that are sensitive to changes in water parameters may even die.

How often should the aquarium water be changed?

Many experts argue that this frequency depends on the age of the aquarium. It is no secret that in his life he goes through all stages of existence: the aquatic system is new, young, mature and old.

Substitution in just running pond. When the new aquarium is launched, experts recommend not to interfere with the state of the aquatic environment for 2-3 months.

At this time, the formation of the internal ecological mini-system takes place, and intervention is permissible only in extreme cases.

Substitution in a new aquarium. After this period, when the young aquatic system was basically formed, you can start replacing part of the water once a month. The recommended dose is not more than 20% of the total.

It is necessary to consider the size of the aquarium. So, if in a 200-liter container it is possible to fill in tap water, then for a 30-liter jar 6 liters of water must be defended for two days.

Such procedures should be combined with cleaning the soil (if necessary) and the walls of the aquarium.

Substitution in a mature aquatic system. About six months later, the aquarium habitat enters a mature phase.

Replacements should be made in the same dose and with the same frequency, with simultaneous cleaning of the aquarium. If the ecosystem is stable, then you should not disturb it once more with your intervention.

Replacing water in an old aquarium. Some experts say that after 1.5-2 years the aquarium is aging.

For its rejuvenation, it is recommended to temporarily switch to another water replacement schedule – 2 times a month. Cleaning the soil after draining part of the water becomes mandatory, and if there is such a need, the soil can be gently removed and rinsed thoroughly.

Frequent water changes are advised to do for two months, after which the rejuvenation of the entire system should occur, and the aquarium will function stably for another year or two.

This procedure is slightly different from the freshwater version. The most important thing is that the water should be prepared, and ordinary tap water is not suitable for substitution (although some aquarists use it in small doses).

It is better to use distilled water, which is added to the finished salt according to the instructions. Such salts are sold in pet stores, their choice is quite wide.

Suffice it to mention the salt compositions of RED SEA CORAL (Israel) or Tetra Marine (Germany).

The frequency and volume of sea water being replaced are subject to heated debate by professionals. Various options are discussed, but most owners of saltwater aquariums talk about a 25 percent dose of the replaced aqua.

What all professionals and amateurs are unanimous about is the need to replace it based on the specific conditions and parameters of the marine artificial reservoir.

Water changes always help to prolong the life of the aquarium ecosystem. And here the most important factor is not only the volume of replaced water, but also the regularity of this operation.

Video on how to change the water in the aquarium:

How often it is necessary to change the water in the aquarium :: how often it is necessary to feed the fish in the aquarium :: Aquarium fish

In the aquarium periodically accumulated waste of fish and microorganisms, as well as harmful substances such as phosphates and nitrates. To get rid of them will help partial or complete replacement of water.

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

  • – watering can;
  • – 2 clean buckets;
  • – 2 m of aquarium hose or primer;
  • – towel.

1. If you have just purchased an aquarium, planted aquatic plants and launched fish in it, then you should not change the water in it during the first two months. At this time, the environment is not yet stable and it is not yet necessary to interfere in the formation of a microclimate.

2. After a couple of months, you can begin to replace the water. Experienced aquarists advise, as rarely as possible to resort to a complete replacement of water in the aquarium, but to replace a small amount of water, approximately 20% of the volume of the container must be made at least once a week.

3. To do this, prepare the water in advance. Put it in clean plastic buckets, which should only be used to work with the aquarium. At the same time, they should not be washed with any cleaning agents, as they can have a detrimental effect on aquatic inhabitants.

Let the water stand for a couple of days. During this time, harmful substances such as chlorine will disappear.

The water will become softer and acquire an optimum room temperature. If necessary, strain the water to remove impurities.

4. Put a clean bucket on the towel. Then drain 1/5 of the water from the aquarium with a hose.

Put one end of it in the aquarium, then suck in a little air through the second, thanks to this intake, the water will flow into the bucket.

5. Clean the bottom and walls of the aquarium from organic matter accumulated on them. For garbage collection, use a special siphon or primer.

Then pour in the separated water with a watering can.

6. Sometimes it is necessary to replace more water to half the volume of the aquarium. This disrupts the biological balance in the aquarium environment, so this procedure should be performed only in emergency cases, for example, if the fish began to be etched with copper or nitrates.

With such a cardinal water change, some plants and fish can die, but within a week the microflora will recover and you can continue to care for the aquarium, as usual, replacing a fifth of the water weekly.

7. Such a cardinal measure, as a complete replacement of water, should be carried out as a last resort, if the aquarium begins to flourish rapidly, fungal mucus appears, and the water in it is constantly turbid. This is usually due to improper maintenance of the aquarium or when introducing dangerous microorganisms.

8. When water is completely replaced, it is necessary to remove all the inhabitants, drain the water completely, remove all plants and decor. Then rinse everything thoroughly, plant algae again, install equipment, pour in soft water. Run microorganisms, bacteria and fish.

The first water change will need to begin only after 2-3 months.

How often to change the water in the aquarium :: Fish aquarium

The health and life of the fish living there depends on how often the water in the aquarium changes. At the same time, it is important to take into account whether this is a new aquarium or a “dwelling” in which the fish are already for a long time.

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

1. Remember that frequent changes in the water in the aquarium leads to the occurrence of diseases and the death of the fish. This is precisely the mistake of many newcomers: fresh water is not at all an ideal option, and all efforts to replace it can lead to undesirable results.

2. Do not change the water in the new aquarium for at least two months. When water is first poured into the tank and fish are launched there, the habitat is too unstable. If the aquarium is large, frequent replacement of fluids will make it difficult for your “pets” to adapt to new conditions, and the process of their development will slow down.

If the capacity is small, such an error can lead to the death of all its inhabitants. Carefully monitor the state of the aquatic environment – if it is healthy, then the fish will be able to live in comfort.

If problems arise, it will affect all inhabitants of the aquarium.

3. When it will be 2-3 months after the start of the use of the new aquarium, begin to change the water little by little. It is allowed to replace no more than 20% of the total volume of a liquid, moreover it can be done no more than once every two weeks. The best option is to replace 15% of the volume of water once a month.

However, if you have such an opportunity, add 10% of pure liquid every 1.5 weeks. Each time, performing this procedure, it is necessary to collect the garbage accumulated on the ground and to thoroughly clean the glass.

4. After 3-4 months, change the topping-up mode again. The fact is that six months after the start of the use of the new aquarium, the aquatic environment is completely stabilized, and for fish there begins a period of the highest level of comfort. Now it will be enough to change 20% of the volume of liquid once a month.

At this stage, your task is not to spoil the established biological balance.

5. Update the aquatic environment one year after filling the aquarium. Within two months, it will be necessary to replace 4-5 times by 20% of the volume of water, moreover, each time it is necessary to wash out part of the soil.

As a result, after 2 months all the glass and other elements of the aquarium should be completely cleaned. When you finish this procedure, you can again change 20% of the water once a month with minimal “cleaning” of the soil.

A year later, the cleaning will have to be repeated again.

6. Change the water in the aquarium completely only in the most difficult situations when it is not possible to restore a normal habitat for fish. We are talking about cases when the water “blooms” strongly, it becomes too turbid, mucus appears on the surfaces, or when dangerous microorganisms that kill fish appear in the water.

How to change the water in a small aquarium :: how to care for fish in a small aquarium :: Aquarium fish

Mini-aquariums – an attractive interior decoration. But unlike large tanks, equipped with all necessary equipment, there are some problems with care.

If you follow the basic rules, including the replacement of water, you can avoid the flowering of the aquarium and create fairly tolerable conditions for the fish.

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

  • – soft defended water;
  • – net capacity;
  • – ladle;
  • – scraper.

1. It is believed that a small aquarium is easier to clean than a large one. However, this is the first misconception of inexperienced aquarists.

It requires more frequent replacement of water, because the products of decomposition of fish waste are accumulated here most of all. In addition, intensive plant growth can cause a lot of trouble.

2. The water in a small aquarium should not be completely changed. It is enough to replace up to 1/5 of the total volume.

This should be done quite often – once every 3-4 days.

3. Replacement water should only be soft, room temperature, so you should have a constant supply. Only tap water from clean dishes that should be used only for this purpose.

To defend the liquid must be at least three days.

4. Replacing water in a small aquarium is not difficult. Calculate the required quantity for replacement.

For example, in an aquarium with a capacity of 10 liters, it is necessary to change 2 liters (1/5 of the total volume).

5. Scoop out the required amount of water with a special scoop with a long handle. Scrub the walls of the aquarium and add fresh soft water.

Then collect water in a clean dish and leave it to stand until the next procedure.

6. The water in the mini-tanks evaporates very quickly. Check its level regularly and top up if necessary.

7. Fully change the water in the aquarium should be as rare as possible, because it violates the biological equilibrium. However, this must be done once a year to transplant plants and clean the walls of the aquarium and filter.

8. To replace the water completely, remove the fish and place them in a jar for a while. Drain fluid with a hose. Remove excess algae.

Clean the rocks and walls of the aquarium.

9. Then pour the settled water. Add bacteria and let the aquarium stand for a couple of days, then run the fish into it.

For dwelling in a small space, choose guppies, gourami and tetra. These fish feel pretty good in mini-aquariums. Also in the pond you can settle a cockerel, neons look beautiful.

If the fish have grown to a rather large size, they need to be deposited in a larger tank.

Very impressive look and feel good in a small aquarium, not only fish, but also other marine and freshwater inhabitants, such as shrimp.

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