The Winter Pill packs a powerful punch in one 4 in. ball that treats up to 30,000 gallons. Just poke a hole in the round plastic casing with the included hole-punch tool (a push-pin) and toss the Winter Pill into the pool. The slow-delivery system will leak out a consistent stream of all-in-one winterizing pool chemical formula all winter long. Pool Winterizer in a Pill The AquaPill WinterPill will help make pool closings fast and easy, so your swimming pool water is clean and clear for opening in the spring. If your pool opens up cloudy, or worse, green - you need the Winter Pill's powerful mix of chemicals. Enzymes seek out and destroy oils and scum in the pool, clarifiers coagulate suspended matter and sequestering agents keep minerals and organic matter from staining your pool Powered by Frooition Frooition | No-js Template | eBay design, eBay store design, eBay shop design, eBay template design, eBay listing design (ver:froo_no_js) This listing is currently undergoing maintenance, we apologise for any inconvenience caused.