GreenClean Tablets utilize an activated peroxygen chemistry, the same oxidizing formula as GreenClean Granular Algaecide, in a convenient tablet form. GreenClean tablets are an essential part of a preventative maintenance program against string and planktonic algae. It is the go-to product for pond owners who do not have time for difficult pond maintenance programs. GreenClean Tablets add vital oxygen to the aquatic ecosystem to support fish and plant health. Apply as a maintenance product 1 week after a curative treatment of GreenClean Granular Algaecide or GreenCleanFX Liquid Algaecide. Can be applied early in the spring to prevent algae before it starts. Each container of GreenClean Tablets comes with a scoop for easy application. A single scoop will treat 200 gallons of water.