I've been on the fence about putting foam under my glass tank. I know flat bottom tanks are supposed to have foam under (like acrylics) but what about glass? Mine has the black trim around the bottom and euro-braced at the top. My stand is made up of 4x4's and 2x4's. I'm thinking of doing foam on the stand then a sheet of 1/2" OSB directly under the tank. What is everyone else doing?