GreenClean Granular Algaecide is a powerful, peroxide-based algae killer that provides immediate control of algae in ponds, lakes, and water features—without using copper. Its oxidation-based formula breaks down algae on contact, releasing oxygen as it works to restore a healthy aquatic environment. GreenClean is one of the only non-copper algaecides available, making it ideal for Koi ponds, decorative water gardens, and any application where fish and aquatic life safety are a priority.

This granular algae treatment can be applied by broadcasting, dissolving, or subsurface application for flexible use across all pond sizes. Application rates range from 3 to 170 lbs per acre-foot, depending on the level of algae growth. GreenClean works instantly, visibly reducing algae within hours while adding beneficial oxygen back into your water.

Beyond pond use, GreenClean Granular Algaecide is also effective for cleaning birdbaths, fountains, statues, walkways, and roofs, removing unsightly algae buildup on contact. Its patented oxidation technology provides fast, eco-friendly algae control that’s safe, biodegradable, and highly effective for maintaining clear, healthy, and vibrant water—all without relying on copper or harsh chemicals.