All new biological formula with proprietary BioBlastPlus odor control technology that performs without fail in all temperature conditions. Use only 2 ounce per treatment in both black and gray tanks. This high powered mixture of bacteria and enzymes 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 is 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.