I hadn't had a proper cleaning in the trailer in a year. I bought the gallon version. I used half gallon in empty tank, filled it all up with water. 40 gallon tank. I let it sit for about 5 days or so. Not only is it clean, the sensors all work now. I'm a believer. Thank you for a product that works! First class.
Rating: [5 of 5 Stars!]