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Hygrozyme prevents the formation of pythium and algae in any growing media. Bacteria-free enzymes break down proteins allowing plants better access to nutrients released in the process. All-natural Hygrozyme is 100% effective.Hygrozyme prevents the formation of pythium and algae in any growing media. Bacteria-free enzymes break down proteins allowing plants better access to nutrients released in the process. All-natural Hygrozyme is 100% effective.