Walex CITRAFR1G Citra-Fresh Liquid Black Tank Treatment, 1 Gal.

Black tank deodorizers in a convenient, easy-to-pour liquid. Designed to start acting immediately to control black tank odors, this citrus-infused formula is perfect for RVers who want precise control over dosing.
With no biocides and no formaldehyde, Citra-Fresh® is a clean, eco-friendly choice for keeping your black holding tank fresh and fully functional—all while adding a refreshing citrus scent to your RV bathroom.