SmartPool WinterBall AP71

Keep your pool clear when you close it for winter. Safe for use with ALL Pool Surfaces and Filters Will NOT Affect Water Chemistry Treats up to 30,000- Gallons No Circulation Required Can be Combined with Existing Winter Kits or used as a Stand-Alone ProductMake Next Year?s Pool Opening Faster and Easier than Ever with WINTERBALLS Patented Pre-Measured Delivery System and All Natural Concentrated Formula. An Easy-to-Use, All-in-One Pool Winterizer that Effectively Maintains Healthy, Clear Water All Winter Long!Simply pierce the WINTERBAL with a pin (provided) and places it in the water. We recommend that there be a minimum of 1PPM of chlorine in the water when closing the pool. No circulation is required. The WINTERBAL will slowly dispense the formula into the water all winter long.Shipping included in the continental U.S.