Pure Power Blue is an all new biological formula with proprietary BioBlastPlus odor control technology that performs without fail in all temperature conditions. Use only 1 pouch per treatment in both black & gray tanks! This high powered mixture of enzyme-producing bacteria is sure to keep your holding tanks clean and odor-free. Put the power of this revolutionary new formula to work for you and see what a difference it makes. This chemical-free, CA compliant solution is accepted at all campgrounds, RV parks, and RV/Marine dump stations. Safe to use in all septic systems. Will not harm children or pets. Fresh and clean scent. Only 1 pouch per 40 gallons! Instant odor control. Works in high and low temperatures. Liquefies all waste and toilet paper. Keeps level gauges functioning properly. Chemical free. Extremely low cost per treatment.