Discover the power of Bio-Fresh's Next-Generation Enzyme System. Bio-Fresh Enzyme Holding Tank Deodorizer is the liquid version of industry-leading Bio-Pak formula. It delivers fast-acting, biodegradable enzymes that liquefy waste and toilet paper while leaving your RV or marine holding tanks clean and fresh. Whether on the road or at sea, Bio-Fresh keeps your holding tanks in top condition, ensuring a fresh and pleasant experience. Superior Odor Control â Neutralizes and eliminates odors at the source. Liquefies Waste and Paper â The fast-acting proprietary enzymes rapidly break down waste and paper. Eco-Friendly â Made from biodegradable ingredients that are safe for the environment and your tanks. Convenient Liquid Formula â Easy to use and quick-acting for hassle-free tank treatment. Trusted by Experts â The liquid extension of the best-in-class Bio-Pak solution trusted by RV and marine enthusiasts. Leaves your RV or marine holding tank clean & fresh Biodegradable ingredients are safe for the environment & your tanks Easy to use, quick-acting liquid formula for hassle-free tank treatment | Walex Bio-Fresh Blue Ocean Mist Enzyme RV/Marine Holding Tank Deodorizer/Digester, 64 Oz