Check the listing for details. BioGuard Smart Shield - 1 qt. Condition: New. Listed at 33.99 USD. Pools - Spas - Stoves - Fireplaces BioGuard Smart Shield - 1 Quart - Part #23762BIO Purpose: BioGuard Smart Shield is the ultimate in pool water conservation This product reduces water evaporation, helping to conserve water and preserve heat A single application last up to 30 days Keep your swimming pool warmer with BioGuard Smart Shield! Product Dosage: 8 fl oz per 15,000 gallons of water Directions: Shake bottle before using With the pump running, add 8 fl oz per 15,000 gallons of water For best dispersion, add Smart Shield in front of pool return lines Run the pump daily for proper circulation For larger pools, add 16 fl oz per 1,000 sq. ft of surface area or 30,000 gallons of pool water oncer per month General Policies Keep your home running smoothly with Clearview, the Clear Choice for your pool, spa and hearth needs! If you have any questions, please contact us before buying. We pride ourselves on offering exceptional customer service and helping to provide you with the complete information you need to make an informed purchase. Shipping and Billing: We only accept payment from and ship to confirmed PayPal addresses All packages are shipped within one day of ordering Returns: Returns are not accepted on opened or used products and are subject to 10% restocking fee If a package arrives damaged or defective, please report it to use immediately so we can promptly take care of the situation Questions: If you have any questions, please contact us. We will always take the time to answer your questions. We have over 25 years in the industry, so don’t hesitate to ask! We’ve probably heard it before! Business Hours: Weekdays 9 - 5 | Saturday 9 - 4 | Eastern Time