tank is sloping forward...

[Quinn]

http://reefcentral.com/forums/showth...hreadid=184618

well now we're having fun... setting up yesterday, we noticed that the full tank leans forward about 1/4". as you can see from the thread above, most people are suggested that i should shim it up. has any here ever done this? any advice? how many of you have tanks that are slightly off-balance? the tank itself is on 1" thick styrofoam so it's not flexing, but i don't like the idea of the weight being unequally distributed.