Bio-Active Holding Tank Treatment uses powerful, 100% environmentally friendly ingredients to break down and liquefy waste and tissue by speeding up the natural composting process. Its 100% biodegradable formula prevents clogging and also lubricates valves and seals for better overall performance. This formaldehyde-free liquid is non-staining and fragrance-free. Specifications:• Size: 168 oz.• Weight: 15.5 lbs.• Model#: BIO-72168 Speeds up the natural composting process Prevents clogging, lubricates valves/seals Formaldehyde-free; non-staining; fragrance-free | Walex BioActive Holding Tank Treatment - 168 oz