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 together? Because if you do, a desktop aquarium or 10-gallon fish tank probably isn’t ideal. I know from experience. Personally, I would recommend a 20 gallon tank for a single crayfish, nothing smaller.

Crayfish are very dirty

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

Crayfish are aggressive and territorial

Crayfish eat and fight anything. They are super aggressive and territorial. Having said that, if you plan on keeping other fish in your tank, you want a tank that is large enough to house 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. Red tail sharks, mollies, and hatchet fish often work well with crayfish as pets. They have for me in the past anyway.

water changes

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

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 crayfish. However, if you must have two crayfish, make sure you have separate hiding places for both. These can be purchased online, are made from PVC, or can be found at most pet stores that sell aquariums.