AquaBio , a new twist on RV holding tank treatments, offers todays RVers a Formaldehyde and Bronopal Free formula. Thetfords next generation of holding tank solutions is campground friendly and complies with California regulations. The quick-acting holding tank treatment eliminates odors while digesting waste and toilet paper to prevent clogging, all without any harsh chemicals. Proudly made in the USA, Thetfords New AquaBio is formulated and tested safe for all RV toilets, holding tanks and septic systems.