The Care Free Enzymes is the only manufactured from natural enzymes that are free of bacteria. This product has been around since 1995 as the exclusive manufacturer of enzymes for the water gardening, agricultural and birding industries. Out enzymes products are 100% environmentally friendly. There is currently nothing stronger and as safe on the market. Biodegradable, non-toxic, safe for birds, pets, plants and humans. Prevents stains, build-up of organic contaminants and sludge. Non-Toxic, Bacteria Free Enzymes. 1 cap full per 5 gallons. Made USA