Had My dum in a 55 gallon for a while, but it seemed to tight for him in there. Also it cracked due to carless cleaning in bathroom.He 5ft and it was time for a adult size cage. The tank cost me nothing, it was a buddys old saltwater tank. Only thing i had to do was find a screen top and cover the three holes in back , which shows in the pic...He love's it,much more space.