I have a female red claw who has just undergone her 4th moult with us, and is now getting quite big. She has been in a 72 litre tank with fish (top swimmers). I want to move the fish into a new tank, and set up specifically for the crayfish. I cannnot find much about ideal tank size, substrate, cover etc. Currently have medium gravel (2 inches), and bog wood. She shovels the gravel out from under the wood, down to the glass, and lives under there. I have moved out stone, and plastic plants to give her more unobstructed roaming room

I would also maybe like to add a male, but would be concerned that they are sold at less than half her current size, and may not survive her "wire cutters" (Used to let her hang onto my thumb and take spirulina sticks until moult three - too painful).

Does anyone have the experience to advise?

Thanks in advance Kevin

A smaller cray would most likley be in danger unless there is plenty of hiding space and a large tank, the red claw grown to 8 to 12 inches so be prepared they do well in either sand or gravel, so it really comes down to a matter of preference but the sand is easier for them to move. Mine is in a 40 gallon well planted with fish for the most part he leaves the fish alone unless they are sick or dieing or dead. Make sure you have a good top on the tank as they are amazing climbers when they want too be. The big concern with ading a male is when one moults they are extremly volnurable to attack ( If you ever need to pick up your cray do it when they moult as they dont usually pinch at this time because there claws are fragile) also if they mate you could (not necissarily) have 150 babbies running around your tank lol

Any other questions dont hesitate to ask, if I dont know the answer I know where to find the answer

Hi, I'm short of experience but am having some good results. crayfishmates.com is a very good source of information