168oz Bio-Active Tank Treatment Deodorizer - Bio-Active holding tank treatment combines bacteria nutrients with enzymes to remove odors and break down waste and toilet paper. Bio-Active lubricates valves, cleans sensors and prevents clogging, all without using any perfumes or staining dies. This powerful commercial grade formula is 100% biodegradable and safe for waste dump stations and septic tanks. It gives you a fragrance free option with unbeatable odor prevention. Formaldehyde free and biodegradble it deodorizes and effectively breaks down waste paper. Use this on its own or as a refill for the tip and pour bottle. 168oz bottle.