Meet the Thetford Duo Tank Cleaner Concentrated - a fresh addition to Thetford's renowned Concentrated family. It cleans waste-holding and grey water tanks in your caravan or motorhome like a pro. The secret to a longer life and no more unpleasant odours for your tanks, it removes stubborn scale, encrusting, and grease deposits effectively. So, if your tanks' level indicators are misbehaving, or the blade valve mechanisms and vent buttons are playing up, this cleaner is your go-to. Remember, dosing is important! Use 200ml for the waste-holding tank and 600ml for the grey water tank. Clean, fresh-smelling tanks are a pour and rinse away. FEATURES• Removes limescale, encrusting and grease deposits• Technical parts inside the tanks are cleaned as well• Prolongs the lifespan of the tanks• No scrubbing required!• Cleaning without damaging the technical parts inside the tanks• 0.8L = 4 cleanings of the waste-holding tank (4x200ml)• 0.8L = 1 cleaning of the waste-holding tank (200ml) + 1 cleaning of the grey water tank (600ml)• For best results use 2-3 times a year