So I am trying to level my Deep Blue 57 gallon Edge on my home built stand. I have leveled the stand to the floor and when I set the tank on top of the stand I have a small gap under opposite corners of the tank. I took the tank off of the stand and took level of the piece of plywood the tank sits on. It has imperfections and I dont have a planer to get it completely flat. Is it ok if I get a piece of foam to go under the tank? If so what type and size? The top of the tank is rimless, the bottom of the tank has a black rim.

