Polystyrene Foam Insulation for Pool Bottom - Pink Vs. Blue
I believe that polysheild is expanded polystyrene, where the pink stuff is extruded polystyrene. Extruded polystyrene is what you want...it is much tougher/stiffer. ... TFP Moderator who uses Pool School and my TF100 test kit along with PoolMath for my: R...