All new biological formula with proprietary BioBlastPlus odor control technology that performs without fails in all temperature conditions. Use only 2 ounces 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.