Controls green water and string algae. Highly effective at combating algae blooms, hair algae, string algae and blanket weed. 

Treats 6,000 gallons per 16.9 oz. 

EPA Registered. 

Safe for aquatic plants and fish.

Tet77187: 16.9 oz.

Tet77189: 33.8-oz/1-liter

Tet77188: 3 liter