I used an anti fatigue mat that I bought at Home cheapo. The mat is what they use in restaurant kitchens. It was around $20. It's a little less than 1" thick. I cut it into 3 long strips and put my tank on that. I used some wood on top to hold it in place and used a small amount of foam only in each corner. It is a plastic 52 gallon tank.
http://www.overtons.com/modperl/prod...ew&i=30458
I'll post some pictures soon - hopefully tonight
Carl