AquaBio RV Holding Tank Treatment - Citrus Twist Scent - Formaldehyde Free - 32ozAquaBio , a twist on RV holding tank treatments, offers today's RVers a Formaldehyde and Bronopal Free formula. Thetford's 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, Thetford's New AquaBio is formulated and tested safe for all RV toilets, holding tanks and septic systems. Features:Superior odor control and waste digestion for RV holding and marine septic tanksFresh citrus twist scent packed into a powerful formulaTreats up to 40 gallon holding tanksCalifornia compliant campground friendly formulaFormaldehyde and bronopol free