PhycomycinPhycomycin is sold in 50 lb. granular bags. Phycomycin is a sodium carbonate peroxydydrate based algaecide that works well in small ponds where oxygen depletion is a concern. This product is used where copper is not an option for Koi Ponds and trout farms. This product reduces organic build up and destroys algal cell membranes and chlorophyll providing immediate control of algae. Phycomycin is a fast acting algaecide that kills algae on contact.