Getting my replacement tank should I put foam or rubber under my tank??? My stand is made out of steel and will not flex at all. I know it is level and flat but my last tank broke on the bottom. Perfecto said they had a problem with their glass when that tank was made and are replacing it for free. I know some people put foam or rubber on their stand to take out any imperfections in the stand. I guess it would even out any pressure pionts but is it needed??? And what size 1/4 or 1/2???? regular foam or dense??? my tank is 150 gal (48 inches by 24 inches)