Prepare your pool for the winter with the PolarShield Pool Protector 10. Perfect for pools up to 10,000 gallons, this kit includes everything you need to close your pool. The powerful Dy-Chlor II Shock (1lb.) rids your water of harmful contaminants while working to restore the efficiency of your chlorine. When paired with the fighting power of Algaecide (1qt.), you effectively defend your water from bacteria, viruses, and algae blooms, priming your pool for the season. For best results, use this kit with a PolarShield Winter Cover.