dude dont listen to anyone at two feet they will be fine in a 240 mine are in a 240 and theres no problems as of yet but within a year or so when i move into my house there will be a basement 2500 acrylic going in about 1.5 in thick but the only thing i can find thats maybe a little not so good is the height of the tank but other than that its a great tank good luck with the kitties,,
