I have used many different black tank cleaners, you name it, I've tried it: additives/disolvers, garden hose, the type of sprayer that twists on to the drain side of the sewer pipe. Mediocre success. With this 90-degree nozzle at the end of the stick, it's the first time I could see the gross stuff being dislodged looking down the toilet. After 3 or 4 attacks, I actually got my black tank level to read EMPTY! That's right-it's unbelievable. I even have the connection on the outside of my camper that a garden hose attaches to for the black tank for rinsing. This product did what it advertises. I'm seldom impressed - but, this impressed me.
Rating: [5 of 5 Stars!]