My biggest complaint on most smaller tanks and the reason for the constant upgrade. It seems that all the cooler fish grow to Monsterous proportions, which means we need to upgrade to Monster tanks. Well at least with a large enough footprint to house them. Case in point: stingrays, arrows, clown knives, wolf fish, snake heads, flower horns, etc. They all get BIG! I agree a 6x3 would be better than than the 10x2. I wish I would've realized this before purchasing my last tank. Width is as crucial as length. Personally, I dont find height to be as big of a concern when compared to length or width as long as it's over 24in.