Originally Posted by Fishies_in_Philly
Cool. I hopes yours holds.
mine came floating up, even with silicone attaching it to the bottom. It's amazing how buoyant that stuff is. You've got enough foam there to save a 200 lb man from drowning.....lol
Actually, that's probably a pretty valid concern for something like that, where it's an island in the middle, and only held down by the silicone glue. Before you finish it, it might be worth carving some holes in the middle layers and putting some bricks or rocks in, and try and get it as close to neutral buoyancy as possible.