Check the listing for details. Walex Biopak Deodorizer Sanitation Septic Tank Treatment Rv Campers Parts 10Pack. Condition: New. Listed at 23.18 USD. Store New Arrivals Add to Favorite View Feedback Contact No need for special toilet paperDeodorizes and breaks down waste and paperPre-packaged portion control - no measuring or pouringNon-staining colorSeptic tank safe Bio-Pak is an all natural enzyme deodorizer and waste digester. A scientific breakthrough developed by the Walex R and D group, Bio-Pak holding tank deodorizer offers unique combination of waste-breakdown performance and portion control convenience that no other natural-based sanitation product available today can match. Bio-Pak's advanced enzyme formula deodorizes and breaks down waste and is safe and beneficial for use in septic tanks. No need for special RV grade toilet paper with Bio-Pak. It will break down the toughest of toilet paper brands.