Hi I have a 500 gallon intex type pool/pond for my alligator snapping turtle. I am planning to keep him outside Year Round now. What can I do to insulate the sides of the pond? The sides of the pond are like a tarp material. Would this work? Placing foam boards against the tarp material and bottom then use underlay and pond liner all around covering the foam boards? I’m just worried about the material not working together not compatible and not sure what type of insulation board to use. Anyone can help?