i have a 17 ft fiberglass hydrostream i pulled the floor up today and it of course has alot of mush it had two pieces of what looks like water soaked foam strip`s running down the center and i`m worried because the fiberglass bottom seems to be soft i can push on it with my foot and it flexes and seems to creek and crackel what do i do i`m aliitle worried to put a floor in the boat i dont wanna waste any money if the boat is just shot