Purpose and Benefits: Pond-Zyme Plus is a heavy-duty pond cleaner, containing five specially selected bacterial strains in a stable dry form. Pond-Zyme Plus breaks down fish waste and dead algae that can cause cloudy water, sludge build-up, and debris that clogs pumps and filters. Organic matter accumulates in all garden ponds producing a build-up of sludge and causing cloudy water. The five strains of bacteria in Pond-Zyme Plus digest sludge into harmless minerals and water, visibly improving water clarity and quality. Pond-Zyme Plus helps pond filters stay cleaner longer, reduces pond maintenance and keeps pond water clean and clear.