aquariums can eb a real problem with the four corners..UNLESS you get those corner pottys and put one in each corner
then it's a breeze and you can have a hamster very happy in a big aquarium
i like them for being draft free (in the winters here in NY are ridiciulous). i have an ovo pad for my hammie, Neessie, and she loves it but she lives under the orange stairs (i call her my little harry potter).LOL.