Square Tanks?

[RDNanoGuy]

I had a 24" cube that I kept a huge Haddoni carpet nem with a mated pair of tomato clowns. That was all I could fit in there! Lol. Also I've got a 20" cube with a Peacock Mantis in my bedroom.

[ScubaSteve]

I love square tanks and built myself one back in the fall. I'd say go shorter than 24" and make up the volume with more sand area. 24" is a PITA when working on the tank (measure from your hand to your armpit and think about it). Plus the large area would give you some cool scaping options. I say go 36"x36"x18" or so.