Toi-De-Fresh Keeps Portable Sanitation Clean and Smelling Good Toi-De-Fresh is a special blend of environmentally friendly bacteria and enzymes both (aerobic and anaerobic) that deodorizes and breaks down waste and tissue found in Portable Toilet, Charter Bus, RV, and Marine wastewater holding tanks. Just one pre-measured water-soluble packet cleans and deodorizes wastewater holding tanks for up to one full week. ** When mixed with water Toi-De-Fresh immediately goes to work! The enzymes are very fast and start breaking down waste on contact. Toi-De-Fresh contains billions of bacteria and as they eat the waste they double in number every 30 minutes! They spread through the entire holding tank digesting the waste and tissue, keeping your tank clean and smelling good. **Toi-De-Fresh is not only for use in black wastewater holding tanks it can also be used in grey wastewater tanks as well. **Why use Toi-De-Fresh – Toss Ins? Environmentally friendly formula that breaks down waste and tissue, Convenient pre-measured water-soluble packets, Maximum strength odor control, Biodegradable, Formaldehyde free, Simple, efficient storage – resealable bag, Cleans and Deodorizes Holding Tanks up to 40 gallons, Non-staining color, 55 – 2 ounce packets per bag, Deep blue color, Baby Powder Fragrance, Made in U.S.A. **Applications for Toi-De-Fresh Toss Ins: Contractors’ Portable Toilets, RV and Marine Wastewater Holding Tanks, Charter Bus Wastewater Holding Tanks, Restroom Trailers, Cassette Toilets, Black Wastewater Holding Tanks (Wastewater from Toilets), Effective in treating Grey Wastewater Holding Tanks (Wastewater from sinks, showers, and washing machines). **Directions for Use: Simply add one Toi-De-Fresh Toss-In premeasured water-soluble packet to the toilet’s wastewater holding tank by either direct adding or by flushing it down the toilet. One packet controls odor and treats a holding tank up to 40-gallons of tank capacity up to one full week (7 days).