Check the listing for details. Natural Chemistry COVERfree Liquid Solar Pool Cover Blanket, 32 oz. 17100NCM. Condition: New. Listed at 29.99 USD. Natural Chemistry's COVERfree is a revolutionary liquid swimming pool cover technology. It's an advanced mono-layer product that helps save water and money by decreasing evaporation. It significantly reduces water evaporation and heat loss which helps retain the chemically treated water in the pool saving on maintenance costs. Simply add 4 oz. of COVERfree to the pool once a week for every 20,000 gallons. COVERfree creates an invisible barrier on the surface of the water that works even when swimmers are in the pool. Save water, save heat and save money with COVERfree!Directions for Usage:Shake Well With the pool circulation pump running, add 4oz per 20,000 gallons of pool water (or 667 sq. ft. of surface area) per week. 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.