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.