1 HP pump with 100 lb sand filter tank. Advantage Sand Filter pump and motor systems are designed to filter out debris 20-25 microns in size. This sand filter pack is perfect for koi ponds or Above-Ground pools up to 11,000 gallons in size. Add a timer to keep your water moving during hours when electricity is cheaper and a chlorinator to automatically keep your water crystal clear. You can set up your pool, and it will maintain itself with these two inexpensive Add-ons. They will pay for themselves in all the chemicals you won’t have to buy to fix the pool when you get back from a long weekend.