API® Pond Microbial Algae Clean uses a novel approach to algae control — live bacteria that compete with unsightly green water and string algae for nutrients, starving it out naturally. It's an alternative to chemical algaecides: safe for fish, plants, and biological filters while reducing ongoing pond maintenance. Available in three sizes for any pond: 16 oz — small to medium ponds 64 oz — mid-size ponds, season-long use 1 Gallon — large ponds, best value per ounce Key Features All-natural bacterial algae control Reduces green water algae (Chlorella) naturally Safe for koi, goldfish, aquatic plants, and wildlife Won't harm the biological filter or affect pH Effective alternative to chemical algaecides Directions for Use Initial treatment: Add 1 teaspoon per 50 gallons (or 0.25 cup per 600 gallons) twice weekly for the first two weeks. Ongoing maintenance: Add 1 teaspoon per 50 gallons once weekly to maintain control of green water algae. Best practice: Apply when water temperature is above 50°F. Remove activated carbon from filters during treatment. Documentation API Pond Microbial Algae Clean Safety Data Sheet (PDF)
