This HTH Super Algae Guard is formulated to kill and prevent stubborn green, black and mustard algae and restore crystal clarity to your swimming pool so you can enjoy splashing fun all season long. Apply this non-foaming algae guard directly to pool water, and you?ll be able to swim just 15 minutes later. This algaecide is compatible with all pool types including vinyl-lined pools and saltwater systems. About the Brand: HTH was developed with the consumer in mind, offering products that are both economical and powerful enough for the toughest jobs. Within HTH?s wide selection of products, we offer everything you need for your pool, from algaecides and deposit control formulas to non-chlorine shock treatments, powerful surface cleaners, clarifiers, enzyme-based cleaners, and more. If you like using HTH, check out some of the other similar brands from our parent company, Sigura. With brands like Applied Biochemists, Leisure Time, GLB, Spa Selections, and PooLife, Sigura has a long heritage and more than a century of experience in developing innovative water treatment solutions for use in pools, lakes, ponds, hot tubs, and more. At Sigura, we have an unparalleled passion, pride, and commitment to delivering superior water treatments that improve the environment and enhance the security, health, and safety of the global communities we serve. With our track record of innovation and simple, intuitive solutions that anticipate needs, Sigura customers feel more secure as they enjoy their pools, spas, ponds, and lakes.