Star brite Instafresh Holding Tank Treatment keeps black and grey water tanks odor-free and clean without relying on formaldehyde. The fresh pine-scented formula breaks down waste and toilet tissue, lubricates drain valves to prevent sticking, and is compatible with all RV, marine, and portable toilet systems. Each use is straightforward — no tools or complicated steps required — and the treated waste can be pumped out at any standard dumping station. This listing is for a 4-pack of 8 oz bottles.

Specifications:

• Pack: 4 x 8 oz bottles
• Scent: Fresh Pine
• Controls holding tank odors and gassing
• Breaks down waste and toilet tissue to reduce buildup
• Lubricates drain valves to prevent sticking and extend plumbing life
• Formaldehyde-free formula
• Compatible with all major RV and marine holding tank systems, including portable toilets
• Prevents clogs with regular use
• Safe for standard dumping stations

Directions:

• Black Water: Use 1 fl. oz. per 5 gallons of tank capacity. Pour through toilet into holding tank and add 1 gallon of water. Increase dosage in hot weather or during extended retention periods.
• Grey Water: Use 1 fl. oz. per 10 gallons of tank capacity. Pour through shower or sink drain and add 1 gallon of water.