Bill I just got in from planting the Petunias on the island. The blue and pink foams are closed cell and should virtually last forever and not water log. I put a piece in the pond last summer and didn't take it out until a month ago and it was unaffected by anything. My bottom layer of foam is 1 1/2 inches thick and I believe I could lay on it and float. The outside of the foam is a rather hard plastic after using the heat gun on it and should take some puninishment. The paint might deteriorate but that would be a quick fix. After leaving it out over night the ropes did draw some water into the medium but whether it is enough, well see. I'll let the flowers grow for a week or two and post a picture.
