platform

Recently I was looking into purchasing a swimming training platform to put into an existing fiberglass pool, to raise the floor for younger kids to go into a more shallow area of the pool (see image). Turns out they are rather expensive and I am wondering if I might build one myself. They...

I built this out of PVC last year and filled it with sand. I didn't realize how buoyant PVC is itself. It floats when I toss it in the pool. Oops. Last year out of frustration I put four paving stones on the bottom of the frame to keep it from moving. It took 120lbs of concrete before it...