The Bio-Kleen KLEEN WASTE holding tank treatment is a highly efficient and concentrated dual-action enzyme and quaternary designed to prevent odor, tissue, waste, and various buildup with regular use. This product ensures clean, properly maintained, odor-free black and grey tanks within your boat or RV. Kleen Waste is formaldehyde-free, 100% biodegradable, and of course it is safe. Safe for septic systems and can be used to clean and deodorize disposals, drains, bilges, portable toilets, and latrines. Key Features: This product features Dual-Action Enzyme and Quaternary This product is a Formaldehyde-Free The Bio-Kleen KLEEN WASTE Lubricates, Deodorizes, and Cleans Lines, Valves, and Probes Breaks down all tissue and waste in black and grey tanks It leaves behind a fresh fruity smell in your holding tanks. It is biodegradable, Made in America