STAR BRITE Instant Fresh Toilet Treatment is a powerhouse solution for maintaining the freshness and functionality of your RV marine or portable toilet systems. This advanced formula excels in controlling unpleasant odors with a refreshing pine or lemon scent making your travel and living spaces more comfortable. Crafted to be environmentally conscious its biodegradable formula and non-formaldehyde composition ensures it s safer for disposal at dumping stations while complying with EU biodegradability criteria. Its efficacy in breaking down waste quickly and efficiently not only simplifies maintenance but eliminates odor. The product is uniquely designed to lubricate drain valves preventing sticking and ensuring smooth operation across a variety of toilet systems. With its high concentration a small amount goes a long way—one ounce can effectively treat five gallons offering a practical and economical solution for regular use. STAR BRITE Instant Fresh is versatile easily applicable in black and grey water systems recirculating toilets and portable units. Its user-friendly application process includes simple dosing instructions tailored for different capacities and systems making it a reliable choice for a wide range of needs. Whether you re on the road at sea or in any portable setting this toilet treatment ensures a clean fresh and hassle-free experience. Holding Tank Systems: BLACKWATER: Add 30 ml for every 19 liters of tank capacity. Pour through toilet into holding tank and add 4 liters of water. Hot weather and long retention times may require additional treatment. GREY WATER: Use 30 ml for every 38 liters of tank capacity. Pour through shower or sink drain and add 4 liters of water. RECIRCULATION TOILETS: Pour 236 ml into initial water charge. PORTABLE TOILETS: Pour 118 ml into waste holding tank and add water to cover tank bottom.