I keep all my snakes in CB-70's regardless of size. What I dont like about the smaller tubs is if they poop/pee they really dont have much room to get away from it. In the CB-70's there is plenty of room for them to move around and not drag their body through their wastes... I think the smallest snake I put in a CB-70 was around 200g and I have no issues. I use to keep all my snakes in 116qt tubs but with 18 snakes I ran out of room.