VMInnovations Swimming Pool Winterizing Chemical Treatment Closing Kit - Up to 10,000 Gallons Swimming Pool Winterizing Chemical Closing Kit - Up To 10,000 Gallons 1 Quart Winter Treatment ensures clear water for closing 1 Quart Stain Control helps prevent and control algae stains and build-up 1 Pound Non-Chlorine Shock kills micro-contaminants, algae, and pathogens 1 Small Floater will control deposits on pool surfaces during the winter months