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Crayfish in aquarium content with fish

maintenance, care, compatibility

One cancer can be kept in a small aquarium. If you regularly replace the water, then enough 30-40 liters. Crayfish hide their food, and you can often find remains in a shelter such as a cave or a pot.

And given the fact that there are a lot of food residues, then in an aquarium with crayfish the balance can be very quickly disturbed and frequent water changes with a ground siphon are simply necessary. When you clean the aquarium, be sure to check all its caches, such as pots and other hidden places.

If more than one cancer lives in an aquarium, then the minimum volume for keeping 80 liters. Crayfish are cannibals by nature, that is, they eat each other, and if during the molt one of them gets to the other, then it will not be worth it.

Because of this, it is extremely important that the aquarium was spacious and there were many different shelters in which a molded cancer could hide.
As for filtering, it is better to use an internal filter. Since the hoses that go to the outside, this is a great way to get the cancer out of the aquarium and one morning you will see it crawling around your apartment. Remember, this is a master of escape!

The aquarium should be tightly covered, since a runaway cancer can live for a short time without water.

Shooting in nature, Australia Euastacus spinifer cancer:

Orange Mexican dwarf crab Cambarellus patzcuarensis

Australian Reddish (Red-fingered) Cancer (Cherax quadricarinatus)

In nature, crayfish mainly feed on plant food. What to feed cancer? In the aquarium, they eat sinking granules, tablets, flakes, and special foods for crayfish and shrimp.

It is also worth buying food for crayfish with a high content of calcium. Such feeds help them recover their chitinous cover faster after shedding.

Additionally, they need to be fed with vegetables – spinach, zucchini, cucumbers. If you have an aquarium with plants, you can give surplus plants.

In addition to vegetables, they eat protein and feed, but they should not be given more than once a week. This may be a piece of fish fillet or shrimp, frozen live food.

Aquarists believe that feeding crayfish with protein feed significantly increases their aggressiveness.

Feed the crayfish in the aquarium should be once a day, but when it comes to vegetables, a piece of cucumber, for example, you can leave it for the whole time until the crayfish eat it.

It is difficult to contain crayfish with fish. There are many cases when they successfully live in a common aquarium, but even more when either fish or crayfish are eaten.

Often, crayfish catch and eat very large and very expensive fish at night. Or, if the fish is large enough, it destroys the decayed cancer.

In short, the cancer content in a fish tank sooner or later end badly. Especially if you keep with slow fish or fish living at the bottom.

But even such a quick fish like guppies seems to be a leisurely crayfish having a sharp movement of claws, having a bite in half, which I witnessed.

Cherax destructor cancer migration in an Australian creek

Crayfish in a cichlid aquarium, especially large ones, do not last long. First, a horn-type cichlid cichlid tears up completely adult cancer (there is even a video in the link article), and secondly, smaller cichlids can kill them during shedding.

Cancer with shrimp as easy to guess does not get along. Even if they eat each other, it’s not a problem to devour a shrimp.

Also crayfish will dig up, tramp or eat your plants. Not all species are so destructive, but the majority. To contain crayfish in an aquarium with plants, the task is useless. They cut and eat almost any species.

The only exception is dwarf Mexican aquarium cancer, it is quite peaceful, small and does not touch the plants.

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.

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.

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.


For all the time I watched aquarium crayfish, I was convinced that they did not pose any threat to fish and plants. Aquarium crayfish can eat plants, pick up dead fish and attack sick people to a considerable extent and without damage, but for healthy fish aquarium crayfish are completely safe. Once a golden fish got sick in my aquarium, its behavior was sluggish and it was more and more at the bottom of the aquarium with its abdomen resting on the ground.

Crayfish well notice sick fish, which soon awaits death.

Though the aquarium cancer was much smaller than a goldfish, it still dragged it with all its might to its hole. Having dragged the goldfish for a sufficiently long distance, the fish pulled out and swam away, and the crawfish again crawled up to it, clutching at the tail fin and dragging it towards the mink.

Watching a similar method of food extraction in the life of crayfish is very interesting.

To contain two or three aquarium crayfish, for example, in a hundred-liter aquarium will not harm the landscape, fish and plants, but on the contrary your aquarium will be alive and much more interesting. So if you decide to watch something really interesting in your aquarium, get aquarium crayfish.

Well, now let’s more detail about the content of aquarium crayfish.

Aquarium omnivorous crayfish and the menu for them can be varied. It may include feed of animal and vegetable origin. Unlike their cold-water counterparts, exotic aquarium crayfish prefer animal food more and should not be bothered much about animal feed.

Aquarium crayfish mostly feed on the same as fish.

For example, when I fed small fish with grated beef heart crayfish, the pieces of meat that fell to the bottom also ate well. You can use it in the feed as well: lean meat, pieces of fresh fish, live or ice cream moths, as well as special food for bottom fish, and this will be more than enough for a good nutrition of aquarium crayfish.

The only requirement is not to stuff everything into the aquarium for the crayfish, and if you are still somewhere, and someone will advise you to use aquarium crayfish as food: mollusks, insects, worms and tadpoles do not pay attention to let such advisers go and catch flies and cockroaches digging worms and go to the pond for tadpoles.

From the vegetable feed, the question arises, do they really need to be added to crayfish in the aquarium in which the plants grow? When I kept aquarium crayfish I never gave them vegetable food, and not because it was not possible.

The fact is that there was simply no need for that in the aquarium in which the crayfish lived and so there were many plants.

I never noticed that crayfish gnawed on the leaves of aquarium plants, but sometimes they ate crayfish roots, but they didn’t dig them out specifically, but only in the area of ​​their burrows and very little and without damage to the plants. In addition, why did someone decide that, if given to crayfish as vegetable feed: nettle, water lily, rdest, algae, carrots, cucumbers, zucchini, spinach, parsley, then crayfish will refuse young tender shoots of aquarium plants?

But to experiment and try to give aquarium crayfish little by little various vegetable food you still need to suddenly have something and like it.

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.

Crayfish have the ability to live in both freshwater and saltwater. These invertebrates have a peculiar appearance, consisting of chitinous shell, a pair of large claws, 4 pairs of legs and a pair of tail fins.

Two pairs of tactile antennae are also called “antennas”.

The behavior of the crayfish is slow and timid. During the day, fast fish can eat all the food, and hungry cancer poses a potential threat to the inhabitants of the aquarium.

They need an individual shelter, which they carefully guard and protect.

The positive qualities of crayfish include their ability to clean the aquarium from uneaten food and other waste.

The content of crayfish in an aquarium is calculated at approximately 15 liters per individual. The main condition for crayfish is the presence of personal space where they can hide or sit out during the molting period. Shelters can be in the form of pieces of pots, stones.

The soil should be sandy, after molting, they use grains of sand to maintain their balance.

Under natural conditions, crayfish sometimes crawl out onto the shore, since they need air, therefore access to the surface of the water must always be open. The optimum is their content in aquaterrarium.

For landscaping aquarium, it is better to use floating or stile-leaved plants such as Anubias or Echinodorus.

Cancers live in clean and hard water of 8-12 ° C at a temperature of 21-27 ° C and with neutral acidity. Aeration and filtration of water is very important. Cancers cannot live in acidic water, and hard water is necessary for their shell.

During the molting period, the cancer throws off the old shell, with age up to 2 times a year. This process is needed for growing crayfish, as the new shell becomes much larger and harder.

After dropping, the cancer takes refuge in the shelter until the formation of a new shell.

The content of crayfish in an aquarium with other fish should be carefully thought out, it is not necessary to colonize them with veil fish, which can easily lose their fins due to the claws of the cancer.

Compatibility of crayfish with bottom catfish such as catfish is very inappropriate, as they will search for food in the same area and fierce competition will appear. Therefore, it is necessary to feed crayfish at night.

Crayfish are especially dangerous for small fish during the night of their hunting, they can track down and attack sleepy aquarium fish. They will not stand on ceremony with small fish like guppies, neons that can fall asleep at the bottom of the aquarium.

Poor compatibility in crayfish with cichlids or other aggressive fish, where crayfish are the weak link.

Red florida cancer

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

Marble cancer is medium in size, reaching 10-15 cm in length. Because of their small size, most aquarists try to keep marble crayfish in small aquariums.

However, they create a lot of trash and dirt and it is better to plant the marble crayfish in the aquarium as spacious as possible. Especially if you want to contain not one or two, but more crayfish.

The minimum amount for the maintenance of marble cancer is 40 liters, and then it is quite difficult to care for such an aquarium. In different sources there are different wishes in terms of content for maintenance, but keep in mind that the larger the space, the larger and more beautiful the crayfish and the cleaner they are in the aquariums.

Better that it was an aquarium of 80-100 liters.

It is better to use sand or small gravel as a soil, it is easier for crayfish to find food on such soil and clean after it is much easier. Be sure to add a variety of different shelters – caves, plastic pipes, pots, various snags, coconuts.

Since the marble crayfish are river creatures and at the same time quite a lot of trash, it is necessary to use a powerful filter, and create a stream in the aquarium. Additionally, it is better to use aeration, as crayfish are sensitive to the oxygen content in water.

The optimum temperature is 18-28 C, pH – from 6.5 to 7.8.

Regular water changes in the aquarium are required, and you need to siphon the ground to remove rotting food residues. In this case, sand will come in handy, since the remnants do not penetrate into it, but remain on the surface.

As for plants, the only plants that can survive in an aquarium with marble crayfish are floating on the surface or in the water column. Everything else will be trimmed and eaten.

You can try to put Javanese moss, they eat it less often, but still eat.

The aquarium should be carefully closed, especially if you use an external filter. Crayfish are very dexterous and easily run away in tubes from the aquarium, and then they die from drying out.

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