What is the best fish tank for a pet crayfish? Well, the answer to this question depends on a few things. Do you plan on having other fish live with your pet crayfish? Do you plan to have another pet crayfish all together? Because if you do, a 10-gallon desktop aquarium or fish tank probably isn’t ideal. I know from experience. Personally, I would recommend a 20 gallon fish tank for a single crawfish, nothing smaller.

The crayfish are very dirty

Crayfish are dirty little creatures. They throw a lot of garbage. And this debris can make your tank ugly and toxic to other fish, if you have any. With a larger tank, such as a 20-gallon fish tank, there is more water to carry all the crayfish waste.

Crayfish are aggressive and territorial.

Crayfish eat and fight anything. They are super aggressive and territorial. With that being said, if you plan on keeping other fish in your tank, you want a tank that is large enough to accommodate all of them comfortably. Having a larger tank will reduce the chances of your pet crab eating your other fish. They will have more space to swim. And your pet crab will have his little territory all to himself. Remember though, with crayfish, any other fish in your tank can become crayfish food at any given time. I always suggest putting aggressive fish in the tank and fish that swim near the top. Redtail shark, mollies, and hatchetfish often do well with crayfish as pets. They have for me in the past anyway.

water changes

With a 20 gallon or larger tank, it will be much easier to manage water changes for your crayfish and other fish. Speaking of which, be sure to change about 25% of the water weekly. This will ensure a healthy and clean tank. One that will help keep your other fish as well as your pet crayfish healthy.

If you get two crayfish

If you decide to get two crayfish and put them in a fish tank. In my experience, it’s only a matter of time before one eats the other. Personally, I think you’ll need a 20+ gallon tank for two crawfish. However, if you must have two crayfish, make sure you have separate hiding places for both. These can be purchased online, are made of PVC, or can be found at most pet stores that sell aquariums.