Liquefies waste & paper

Natural bacteria & carefully-sourced enzymes eliminate clogs & odor

Available in Alpine Fresh and Ocean Mist

Bio-Fresh® is Walex’s most advanced natural black tank treatment with a combination of beneficial bacteria and digestive enzymes designed to liquefy waste and control odors. The powerful formula starts working instantly to break down waste, eliminate odors, and liquefy toilet paper—without the use of harsh chemicals.

Ideal for RVers who prefer a pour-in solution, Bio-Fresh® is safe for septic systems and campground approved. Continued use keeps your black tank sensors clean and your plumbing system running smoothly.

Available in Alpine Fresh and Ocean Mist fragrances. Each fragrance available in 32oz, 64oz and 1-gallon.

Why Choose Bio-Fresh?

• Breaks down waste and all toilet paper types
  • Natural bacteria & paper-digesting enzymes liquefy waste and paper, eliminating the need for special RV toilet paper
• Controls odors with natural enzymes
  • Carefully-sourced enzymes target and eliminate odor molecules
• Maintains clean sensors, valves, and seals
  • Keeps your RV’s waste system in peak condition with regular use.
• Liquid format allows for easy portion control
  • Great for RVers who want more dosing flexibility or prefer liquids over packets.
• Safe for septic tanks and California compliant
  • Meets strict environmental guidelines for use anywhere you travel.
• Fresh scent and fast-acting performance
  • Leaves your tank smelling clean and working efficiently from the first use​.

Instructions for Use

Black Tank

Add 4oz for up to 40 gallons. Add adequate water – 1.25 gallons for every 10 gallons of tank capacity. Adding an extra 2-4oz of Bio-Fresh is safe if desired.

Grey Tank

Add 2-4oz of Bio-Fresh down the sink drain and follow with 5 seconds of water.