The Robelle Swimming Pool Triple-Action Winter Kit helps keep clean and covered pool water, clear and odor free. This winter pool closing kit includes Robelle Summer and Winter Multi-Purpose Algaecide, Robelle Winter Stain and Scale Control and Robelle Oxidizing Shock and Swim. Using these winterizing chemicals will make spring pool opening easy and stress-free. Robelle Summer and Winter Multi-Purpose Algaecide will prevent algae growth while the pool is closed. This is the best algaecide for the harshest winters. Robelle Winter Stain and Scale Control is a sequestrant that prevents rust, scale and corrosion while the pool is closed. This is the best Stain and Scale Control for protecting pool surfaces and pool equipment in cold water. Robelle Oxidizing Shock and Swim is a full-strength non-chlorine oxidizing pool shock. This shock eliminates organic contaminates without affecting pH or chlorine levels. Customers prefer this winter kit for their swimming pool because it is easy to use, makes pool closing quick and works great making spring opening simple. The 10,000 Gallon kit contains 1 pt. of Robelle Summer and Winter Multi-Purpose Algaecide, 1 lb. of Robelle Winter Stain and Scale Control and 1 lb. of Robelle Oxidizing Shock and Swim. The 20,000 Gallon kit contains 1 qt. of Robelle Summer and Winter Multi-Purpose Algaecide, 2 Lb. of Robelle Winter Stain and Scale Control and 2 lb. of Robelle Oxidizing Shock and Swim. The 40,000 Gallon kit contains 2 qt. of Robelle Summer and Winter Multi-Purpose Algaecide, 4 Lb. of Robelle Winter Stain and Scale Control and 4 lb. of Robelle Oxidizing Shock and Swim.