The "Temanaku Tanklin" was developed by the manufacturer of water reservoirs, so you can easily clean the inside of the tank. The main use is a water tank cleaner for ships, yachts, cruisers, and ferrys. "Temanak Tanklin" is all food additives. Environmentally friendly design for cleaning and discharging water. Please use this product as a guideline for 6 months from your purchase.