Whink® Liquid Septic Treatment. Professional strength. Liquid septic system activator. Earth friendly. Biodegradable. Accelerated enzymatic action. For fast breakdown of microbial wastes! 32 fl oz (946 ml). From Whink®... makers of rust stain remover. Contains septic-cleaning bacteria and enzymes. Digests organic solids, including fats and oils. Reduces the need for costly pumpouts. Safe for plumbing. Monthly treatments are essential for restoring microbes destroyed by detergents, cleaners, and bleach. 100% Natural ingredients. Comments, Questions: Call weekdays 9-4 CST toll-free 1-800-247-5102. www.whink.com. © 2012 Whink Products Company.