Compositions for treating bodies of water are disclosed herein. The water treatment composition can include sodium percarbonate, a binder, a fibrous material, and inert materials combined to form an integral product. The integral product can be in the form of a tablet. The binder can be vinylpyrrolidone-vinyl acetate copolymer, the fibrous material can be organic fibers, for example cotton fibers, and the inert material can be polyethylene glycol. The integral product can be between approximately 70 to 95 weight percent sodium percarbonate, between approximately 0.5 to 10.0 weight percent binder, between approximately 0.05 to 10.0 weight percent fibrous material, and between approximately 1.0 to 10.0 weight percent inert material. More specifically, the integral product can be approximately 91 weight percent sodium percarbonate, approximately 4.5 weight percent binder, approximately 1.0 weight percent fibrous material, and approximately 3.5 weight percent inert material. The integral product can be moisture free and water soluble.
