I have a 4-5in common and the *hit they can do is amazing mine is in a 30gal and its alittle over half full when i Go to feed him he some how swims really fast to like jump out of the water like an inch or so just enough to get he's claws on the tank rim and then pulls him self up on to the rim just enough to stretch he's head out take a big at me then he falls back wards into the tank funny as h*ll
Don't over feed 90% of the captives are all over feed it's sad when you look at them from below and you can't see there shell just leg fat