Aqua-Kem Powder Fresh Toss-Ins 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. Toss-Ins comes in 1. 5oz packets and 3 fragrances: Powder Fresh Scent, available 8 or 12 pack sachets Morning Sky Scent, available in 12 pack sachets Garden Mist Scent, available in 12 pack sachets? 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, liquifying 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 pre-measured child-resistant bottles and is safe for septic tanks, RV and boat holding tanks, recirculating toilets, and for portable toilets. 1. 5 oz. of Aqua-Kem will deodorize a 40-gallon waste holding tank. Extremely hot weather or longer retention time may require additional Aqua-Kem.