Hosting an off-the-hook Memorial Day pool party? Make sure your pool is in tip-top shape with the Pre-Memorial Day sale going on now at PoolSupplyWorld . Get instant rebates on natural gas heaters and check out value bundles on chlorine and chemical kits at awesome prices. Save hundreds in rebates on pool cleaners. Above-ground pools are also on sale - save up to $400! Get free shipping when you spend $100 or more, plus no sales tax for U.S. orders. But don't delay because this sale ends on 05/25/2014.