i use the 41qt tub withthe locking lids/handles) asI do take th snakes out so they do get extra roaming time. I also seen the 50 something under bed size tubs they can work as well if keeping a single snake just remember to watch setting up the tub and the heat source since it on wheels and will not transmit the heat as well if you don't tape it ot the tub itself.( or remove the wheels)