Aqua-Kem is an efficient holding tank treatment that works around the clock, in all weather conditions. The 3-in-1 product functions as a holding tank deodorizer, a waste digester, and a holding tank cleaner. ? Holding tank deodorizer - Formulated to work in any weather condition, Aqua-Kem's packing the most effective odor control available on the market. ? Waste digester and liquefier - Clogging is no longer an issue, as Aqua-Kem breaks down solid materials, liquefying waste and toilet tissue in holding tanks. ? Holding tank cleaner - The third component of the 3-in-1 formula is the detergent, which cleans the holding tank walls and drain lines, maintaining the tank and lines in top shape. The 100% biodegradable waste holding tank treatment comes in child-resistant bottles and is safe for septic tanks, RV and boat holding tanks, recirculating toilets, and for portable toilets. Dosage: ? For RV/ Marine Holding Tanks: Add 8 oz. of the product to a 40-gallon waste holding tank by flushing it into the tank and add one gallon on water. ? For Portable Toilets: For most portable toilets, add 4 oz. to waste holding tank by pouring through the valve opening with a small amount of water. ? Recirculating Toilets: Add 8 oz. of Aqua-Kem when filling with the initial freshwater charge. ? Septic Tanks: Aqua-Kem is safe to use with septic tanks on a minimum basis. The product shouldn't be used more than once per week. Note: Extremely hot weather or longer retention time may require additional Aqua-Kem.