Walex Bio-Fresh Liquid RV Holding Tank Treatment, Alpine Fresh

Walex Bio-Fresh is the liquid version of the best-selling Bio-Pak treatment, made for RVers who prefer a pour-in liquid over a drop-in pod. Its powerful enzymes quickly break down waste and stubborn toilet paper, keeping holding tank sensors working and the system running smoothly, without the need for RV-grade toilet paper.

The non-staining formula neutralizes unpleasant odors and is ideal for black holding tanks from 2.5 to 40 gallons, whether you are RVing, boating, or boondocking. Septic-safe and campground-friendly, in a refreshing Alpine Fresh scent. Available in multiple sizes. Made in the USA.