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Crayfish in aquarium content

maintenance, care, compatibility

In the previous article we talked about the roots of domesticated arthropods, looked at the features of their appearance, and ran through the most popular types of aquarium crayfish. So, let’s continue the story.

It will now be about how to create the most favorable conditions for their existence and avoid many diseases and other troubles.

At once we will say that this neighborhood often brings only problems. There are, of course, cases when crayfish coexist well with fish.

But even more situations where one or the other side suffers as a result of such a tandem. For example:

  1. Soma are arthropods’ competitors for food and shelter. Collisions on this ground are inevitable.
  2. Small fish like neons, guppies, etc. can be crayfish elementary eaten.
  3. Large fish with long tails and fins (gold, angelfish, etc.) can lose their wealth.
  4. In the vicinity of large, but aggressive fish like cichlids, crayfish are doomed to hunger and stress, and ultimately to death.

Thus, if you are not ready to take risks and experiment, keep the crayfish apart.

It affects the limbs, abdomen and oral apparatus. Cancer paralyzes and he dies.

There is no cure. Patients are isolated.

Spores can get into an aquarium with inadequate and poorly treated soil and plants. Mushrooms affect integuments, gills, blood vessels and heart. Brown spots can be seen on the belly and gills.

Reduced immunity, injuries, unfavorable conditions – all this places crayfish at risk.

Thus, crayfish can trap a lot of hazards. But mostly these are consequences of poor care.

A responsible owner, they will long please their unusual appearance and interesting behavior.

From the place of purchase to the place of residence of arthropods transported in a black opaque package. Adaptation is fast.

It should be borne in mind that the temperature difference in the package and in an artificial reservoir should not be more than three degrees. The following conditions are considered optimal for cancers:

Aquarium. The minimum volume of the tank must be at least 15 liters per 6 cm specimen. However, given that close housing provokes crayfish to aggression, it is better to take a vessel as spacious as possible.

From above, it is imperative to install a cover with small holes, as in case of overpopulation, the crayfish will be trying to get out of the aquarium when overcrowded, the water is dirty or oxygen-poor. If possible, the best option is to equip the aquaterrarium.

Water must be clean, rich in oxygen, with a temperature in the range of 17-21 degrees and a hardness of 8-12. To increase the stiffness in the ground, you can put marble or limestone.

It is better to install an internal filter in order to stop attempts to escape by wires. Cancers love to hide the remnants of food, which then rot and spoil the water.

In this connection, regular replacement of 50% of water is necessary.

Priming better to choose large. Crayfish dig holes, and not a single plant will take root in the shallow soil.

Vegetation. Algae is better to pick up with strong roots, large leaves and strong stems.

Before planting, they should be held in quarantine.

Registration. Various stones, snags, hoses, halves of ceramic flower pots, grottoes, etc. can be used as decorations. From them crayfish build shelters for themselves and climb them to the surface of the water.

It is better to do this in the evening hours, as the daytime crayfish hide. If arthropods coexist with fish, in the latter by the evening the activity decreases, and they will not drag feed from claw carriers from under the nose.

Despite the fact that aquarium arthropods are omnivorous, there are some nutritional recommendations for them. Over eighty percent of the daily ration of crayfish should be plant food.

You can give elodey, nettle, water lily, rdest, algae, carrots, zucchini, spinach, parsley. For a variety of give various mollusks, insects, worms, tadpoles, frozen bloodworms, feed for bottom fish.

As a delicacy, you can sometimes treat fish to pieces or lean meat. Meat can be raw, boiled or in the form of stuffing own twist without store additives.

Interestingly, crayfish prefer it in a slightly rotten condition. Protein food is given no more than once a week, since it has been observed that it increases aggressiveness.

Special feeds for crayfish and shrimp are also available, which can also be used (for example, such brands as Dennerle, Tetra, MOSURA, Genchem Biomax series). They strengthen the immune system, maintain the brightness of pet coloring.

There are granules, plates, sticks.

As for the frequency of meals, there is no unity of views. In some sources, it is recommended to feed females once every three days, males – once every two days.

Others advise for both sexes meals once a day. Therefore, here you can see for yourself the behavior of your pets and by trial and error will select your ideal schedule. During molting or crayfish breeding, the number of meals increases.

Young individuals readily take ready food for fry, artemia, shredded tubule. In addition, they still eat organic decay products, thus cleaning the aquarium.

To improve digestion and prevention of parasites, dried leaves of oak, alder and beech are given.

The mating period in adults begins after the completion of molting. In females at this time there is a selection of pheromones, which attract the opposite sex, and the males go in search. It is very interesting to observe how the formed couple dances, sometimes for several hours, touching each other with their antennae.

After that, the female is recommended to be planted in a separate container, where after 20 days she will lay eggs.

Relocation is necessary, as heightened anxiety and anxiety make her protect her offspring and show aggression towards everything around her. The eggs are attached by a sticky mass under the belly, and the female moves with them. Offspring fearfully and for a long time prefer to hold on to the torso of the mother.

Eating crustaceans themselves begin only after the first molt. Shelters for young stock is a prerequisite to survive, hiding from offenders (including adult crayfish).

After the second molt, the offspring gains sufficient autonomy, and the female is again resettled.

There are many, but here we consider only the most common.

This disease is very common in aquarium arthropods. The reason is the poor conditions in the aquarium.

The simplest microorganisms settle on chitinous integuments, as a result of which the cancer looks covered with brown or grayish-white foam. If this plaque spreads to the gills, then the animal will not be able to breathe and will die. For recovery, it is necessary to put in order the water and the number of inhabitants in the aquarium.

At the time of illness, the animal is quarantined.

Also has an infectious nature. Pathogens – fungi of the family Mucedinaceae. Spots appear on the body of the cancer (orange, brown, black), then the shell in these places softens and the tissue dies out with the formation of ulcers.

The end result will be the death of the animal. There is no cure.

As in the previous case, the quarantine of a new cancer with the addition of leaves of oak, beech, and almond was recommended.

One cancer is allowed to keep in the aquarium of small size. If you expect a regular replacement of water, you can stop at 30 – 40 liters. In any case, it is necessary to provide shelters, as most often crayfish hide the remnants of food in caves or pots.

It is important to prepare for a large amount of leftover food, regardless of the fact that there is an aquarium inhabitant. If you do not take into account this factor, you can face a serious imbalance of water and the need for its frequent replacement.

It is advisable to conduct regular checks of secluded corners of the aquarium in order to maintain cleanliness in the house of the male and his females.

If large crayfish live in an aquarium, a volume of eighty liters is required. It must be remembered that the inhabitants are cannibals, because they can eat each other. Moreover, the risk increases with moulting, when any gender becomes dangerous for neighbors.

Wanting to protect the crayfish from each other, you need to take care of the presence of a spacious aquarium with numerous shelters. The male and female must be able to hide from each other during shedding.

To filter the aquarium, it is desirable to use an internal filter. The most important thing is to understand how to maintain decent comfortable living conditions for aquatic inhabitants.

If an external filter is used, the situation with the hoses may not be as desired. Cancer is able to get out of the hose and start crawling around the apartment. It must be remembered: the crayfish are capable of escaping.

Wanting to protect the apartment from the male and his girlfriends, it is desirable to tightly cover the aquarium. Moreover, it will not be very pleasant to understand early in the morning that the male escaped with his girlfriends, who almost died, because cancer cannot live without water for a long time.

Recently, quite often owners of aquariums are settled in a crayfish tank. Watching them is very interesting, especially when they wash.

But the opinion that they do not require special care is wrong. Of course, no one cares for crayfish in the pond, but it is there that all the conditions for a comfortable stay are created.

It is the same conditions you need to create at home.

The aquarium should be spacious. River crayfish take a lot of space to move around and get food.

At the bottom should put a small, clean pebbles. In addition, it is necessary to build a refuge of large stones. This is necessary so that cancer hides in the daytime.

Without shelter, he may be stressed out due to fear.

The maintenance of crayfish in an aquarium implies not only care, but also the creation of conditions close to natural ones.

Water should be 25 degrees. Crayfish calmly tolerate climate change, so they are not afraid of night temperature changes. However, strong warming can adversely affect the health of the animal.

Water should not be acidic. In such a liquid, the crayfish will die.

As for nutrition, it should be varied. In the aquarium, it is necessary to plant river plants, which the cancer will eat a little.

It is important that there are superficial plants. Eating crayfish can and conventional food for fish.

Only need to buy food that will sink to the bottom. Sometimes you need to give delicacies – raw meat, fish and earthworms.

All this animal with pleasure will eat.

How to keep crayfish in an aquarium if there are other aquatic inhabitants? All listed conditions must be met.

But beyond that, don’t forget about the fish.

It is better to transplant small individuals in order to avoid not to find them in the morning. It is also important to ensure that the crayfish get food.

They easily die of hunger, so you can not leave them without food.

Crayfish are subject to molting. For the year, they can change color two to three times.

This is a completely normal phenomenon, which is observed in nature.

Frequent molting is dangerous. If this happens, then you need to look for the cause in the water. Usually, crayfish begin to fade when the climate changes.

This means that the conditions for a uniform water temperature are not created in the aquarium.

Or, when the aquarium is near windows or heating devices.

Crayfish in the aquarium are special inhabitants. The unattractive gray inhabitants of reservoirs wonders of breeding turned into real beauties. Their number is more than one hundred species: apricot crab, Cuban blue, peaceful by nature dwarf marsh, white Florida Florida and many others.

Now decorative crayfish living in an aquarium, no one is surprised. To make them feel comfortable, you need to create for them a certain microclimate and even to equip the design of their home.

The most demanding to the conditions in the aquarium familiar to all the crayfish, because in nature it is used to constant temperature changes. These crayfish do not like to be too hot. Water temperature above 25 ° C contributes to frequent molting, and this in turn affects the duration of their life.

They feel well in non-acidic water of medium hardness rich in oxygen. It is necessary to be very scrupulous with regard to the chemical composition of water, since they can die from the smallest amount of copper, nitrates or nitrites.

Cancers behave actively at night, so they feed them in the late afternoon. The male is given food once every two days, and the female once every three days.

The amount of food increases during the breeding season and molting. Feed the crayfish can be a special feed from the pet store, both animal and vegetable origin, but they still love the plants more.

You can feed the crayfish with dry leaves of beech, oak or alder, which help clean the intestines.

When picking up algae in an aquarium with crayfish, you need to consider that they will undermine their roots and try to snack on the stems in order to enjoy.

Equally important is the presence of shelters. During critical periods, such as molting, they hide most of the time.

Therefore, there should be more shelters in the form of pipes, stones, snags and other objects in order to avoid a battle for the territory than the crabs themselves.

It is advisable to cover the aquarium; inside it you need to build a snag hole to get the cancer to the surface of the water.

Crayfish in the aquarium do not always get along with the fish. Someone from this neighborhood may suffer. It is impossible to keep along with crayfish bottom lovers, such as catfish, as well as goldfish and angelfish. which they can cut their tails and fins.

Large cichlids that infringe the rights of crayfish are not suitable for living together.

Aquarium crayfish content breeding compatibility photo video description.

The maintenance of crustaceans is possible in small tanks with fresh, prepared water. If you carry out regular water changes, then an aquarium with a volume of 40 liters per individual is sufficient. Crustaceans can hide their food, so install grottoes or caves in the nursery.

Filtration of water and siphon of the bottom is necessary so that the remnants of the feed will not start to rot. Periodically check all shelters.

Use the internal filter for the aquarium, on the outer crayfish can easily get out.

The maintenance of two or more crustaceans will require a larger tank with a capacity of 80-100 liters. The fact is that 1-2 times a year, aquarium crayfish molt, and if one congener catches the eye of another, they will eat the last one.

Spacious aquarium with caches will protect everyone from cannibalism.

What is molt? Like all arthropods, crayfish molt.

Their body is covered with a hard chitinous cover that is growing, and for the growth of the new, the old must be dropped. If the aquarium crustacean hides more often, it means that it is preparing for the process. After molting, he will eat his old shell, because there is still a lot of calcium in it to grow a new one.

Fully cover will resume in a few days. Juveniles are subject to frequent molting, unlike mature ones.

In the natural habitat (and crayfish are found on almost all continents), they eat mostly plankton and plant food. Content in captivity involves feeding with special feeds for crustaceans, sinking granules and tablets. You can give vegetables – spinach, cucumbers, zucchini, lettuce, the remnants of aquarium plants.

Also add to the diet protein foods, only 1 time per week: fish fillet and shrimp, live food in frozen form. Feeding – once a day in small portions.

All crayfish are easily divorced in captivity, but the rules for each species are different.

The body size of the crustaceans also depends on the particular species. The largest freshwater cancer in the world is the Tasmanian giant cancer (50 cm in length, weight – 5 kg).

Other species are small, reaching 12-20 cm in length.


It is possible, but for a long time he does not live and definitely cannot be kept with fish and plants. Our crayfish is large and agile enough, it catches and eats fish, weeds weeds. It does not live long, because this species is cold-water, we have warm water only in summer, and even then, it is rather cold at the bottom.

And in the aquarium is warmer than he needs. If you want to contain it, try it.

But, only in a separate aquarium.

Marble cancer: content in the aquarium, compatibility, reproduction, photo-video review


(Marblecrayfish, Procambarussp.)

This beautiful inhabitant of the aquarium world is an ornamental freshwater crayfish, which is characterized by its marble coloring. In addition, these arthropod inhabitants of the aquarium are same-sex – they have no males.

Motherland The marble crustacean is not known, but was first discovered by the Germans in Germany.

Growth this aquarium cancer occurs fairly quickly, after each shedding marble significantly increases in size. And ultimately reaches about 13-15 cm. In length. Further growth slows down

Color – based on the name, it is not difficult to guess that this cancer has a beautiful marble color. The overall color tone is variable: greenish, black, brown, and only a pattern on the body gives the cancer marble tones.

Juveniles of this cancer are stained weakly, they are almost transparent, becoming an adult, the cancer acquires a juicy marble color.

Marble crustacean in form no different from ordinary crayfish – has five pairs of legs, and if you consider the mustache – then even more.

Photo structure of crustaceans

Comfortable aquarium for a marble crab it is considered a “pond” with a lot of shelters (grottoes, caves, stones, snags), where the latter likes to hide in the daytime. These crayfish lead a midnight life ..

VERY IMPORTANT. So that each multi-fingered inhabitant of your aquarium has its own individual shelter.

It should be noted that the size of the aquarium does not play a special role. The main thing is a personal home for everyone.

It is also worth ensuring crayfish have access to the surface of the water, as they sometimes breathe air.

Requirements for water parameters for the maintenance of marble crayfish: a prerequisite for keeping crayfish is good aeration! Otherwise, these aquarium inhabitants are not whimsical. Comfortable water temperature for them is from 18 to 28 degrees.

Water change should be done every two weeks.

Food for crayfish: eat any bottom food, dry, live, etc. They are fed at night, due to their activity at this time.

Marble cancer compatibility with other inhabitants of the aquarium: these crayfish are friendly! However, in the neighbors are not recommended bottom fish (catfish), as well as slow fish (for example, Goldfish).

This is due to the fact that conflicts can occur between them, as a result of which the fish will be “cut”.

Molting process u is like all crustaceans. During the molting period, the crustaceans are defenseless, and therefore they do not leave the shelter for a long time. You should pay attention to the fact that it is impossible to remove the discarded shell from the aquarium because the crayfish eat it up thereby replenishing the chitin supply.

Photos of marble cancer

Very interesting reproduction of marble crayfish, the fact is, these “comrades”, or rather “citizens”, do not have males. They multiply, the so-called parthenogenesis.

Puberty marble crayfish comes after several molts, when the color of their shell becomes bright. This occurs approximately in 2-3 months of life.

There are no special conditions for reproduction. Good feeding and maintenance – this is the key to successful breeding crayfish. The female without leaving the shelter, for about a month (the period of incubation of eggs), bears her eggs, gracefully ventilating her with her paws.

After, fry are born, about 60-80 crustaceans, which can be planted after a month.

An interesting video of marble cancer

Briefly about the content of invertebrates and other animals in the aquarium

Very often aquarists try to get rid of snails. Just the problem is that many species of snails multiply very quickly, overflowing the aquarium and spoiling its appearance. There are many ways to get rid of snails, for example, to get predatory snails helen.

Of course, this method is the most convenient, along with such methods as keeping fish eating snails or setting traps. Note, however, that a limited number of snails in an aquarium is not only not harmful, but useful, since the snails clean the aquarium by eating the remnants of food and other garbage.

The larger the snail, the easier it is to control the amount in the aquarium and the slower it multiplies. Of the largest species, ampularia (Ampullaria sp.) Is the most popular, which can grow up to 10 cm.

It does not require any special conditions for its maintenance, but it cannot be planted together with large, predatory species. They can eat it or tear off her mustache. When keeping such large snails, it is important to monitor their number and clean the dead promptly.

Dead snail decomposes quickly, while spoiling the water.

The content of crayfish in an aquarium creates many problems (and here we talked about the most popular crayfish in the aquarium). They will hunt any fish that dare to swim close.

And believe me, with their external sluggishness, they can be very fast! Often, inexperienced aquarists plant crayfish in a common aquarium and then wonder where the fish go … In addition, they actively dig up the aquarium to suit their design needs and at the same time cut the plants.

Suffer from their attacks and even fellow shrimp.

The best thing is to keep the crayfish in a separate aquarium, because they can really be very beautiful. But also dangerous for other residents.

If you want to have cancer, then the Mexican orange dwarf cancer will be the most accommodating and beautiful.

When we buy a new animal in the aquarium, we expect that we will be prompted to make the right decision and be dissuaded from the wrong one. But most often this does not happen.

And invertebrates and amphibians enter the aquarium, which are not needed there and even dangerous.

Remember: do not buy species unfamiliar to you, if you do not know what you need for their content, and how to keep them right! This will save your pets from death, and you from unnecessary expenses and stress.

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