Greetings all: I am going to be setting up a new paludarium. This is going to be the first time I will be using GS and making a background. Could I use the 1/2 pink/foam insulation board (home depot sells)to make my background? I would apply the GS and cocofiber to the insulation board (rather than the glass tank)and then silicone the board onto the back wall. Does this make sense? I am just concerned about working on the tank itself in event it did not turn out as I wanted, I would not have to take it off the glass tank. Also, I know I cannot have the foam submerged in water any suggestions for what I could put on the bottom that could withstand the water? Thank you in advance for your help with this!