AquaBio (TM), A New Twist On 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 (TM) Is Formulated And Tested Safe For All RV And Marine Toilets, Holding Tanks, And Septic Systems.