AquaMax® holding tank treatment's advanced enzyme powered formulas neutralize odors and accelerate waste digestion to prevent clumping, clogging and tank residue, all at the same time. Thetford's beneficial probiotic treatments are Bronopol and Formaldehyde-free. Proudly made in the USA, Thetford's new family of AquaMax® holding tank treatments have been extensively researched and tested safe for all RV and marine toilets, holding tanks and septic systems and is compliant with the state of California regulations.