I built my 12 x 16 floating dock about 4 or 5 years ago with plastic barrels for floats. They are leaking and the dock is listing now. Since I have to pull the dock to replace them I'm going to replace the barrels with "store bought" floats and hopefully do it only once. The best price I've found are for Eagle Floats from Walmart, 36" x 48" by 16" are $135 each DELIVERED. The free shipping is what makes this attractive, you can find better pricing but the shipping cost is a killer. Any thoughts on this product or know a better source? As usual, thanx in advance!