actually use aquariums as hamster cages too! Again, I shall mention that the cage must be no less than 360 square foot . In the case of the aquarium, it can be no less than 20 gallons . When I say Aquarium, I mean a fish tank, so when you’re looking for one, be sure to head for “fish” and not “small pets” when in a pet shop or online!
While there's nothing wrong with hamster cages, a very intricate one can be expensive. Rather than shelling hundreds of dollars for such a cage, you might try converting an old aquarium into Fluffy's new habitat. If you have a master escape artist, tanks are also pretty safe -- as long as you don't give the hamster a chance to climb on something to reach the top of the tank.