im putting floorboards in the bottom of my 13ftk flat bottom and was told to put pink Styrofoam under the boards between the braces.. would you all recommend the Styrofoam or not or a different Styrofoam my dad has some white styrofoam.. is there a difference in the Styrofoam and density and bouency (bad spelling) or if Styrofoam would even make a difference...thanks