Septic system treatment plus drain maintainer. Contains billion of 100% natural active bacteria and enzymes that have been selected to effectively digest septic system waste. Breaks down the solid organic waste that can accumulate in the septic tank, such as detergents, soaps, grease and paper. Also helps keep drains running smoothly. 10.6 oz every month (approximately 1-1/3 cups) for septic tanks up to 1500 gal. Drain maintainer Pour 3.5 oz (approximately 1/2 cup) down the drain followed by 8 oz (1 cup) water. One dose, two-dose powders or three-dose gel-pac.