Long-lasting chlorinating tablets. Slow dissolving 6-in-1 formula. Kills bacteria. Controls algae, prevents corrosion, scale and metal staining. Makes water silky smooth. Includes built-in stabilizer to protect chlorine from sunlight degradation to last longer. Skimmer, feeder or floater application.Controls algaePrevents corrosion and scaleKills bacteriaRemoves organic contaminants for clear waterMakes water silky smoothProtected against sunlight to last longerSlow-dissolving 6-in-1 formula