Controls algae slime in pools, outside spas, whirlpools, and hot tubs. Can be used indoors or outdoor Made in the U.S.A. 1 gal.

Additional Information
Twinco Ultra Algaecide is a multi-task product that kills/prevents all types of algae growth ultra clarifies water and is super chlorine booster for both chlorine and salt pools. It helps increase chlorine residuals in salt pools especially during heavy use periods. 1 gal.