Here is my take. I bought this on Amazon because the black tank sprayer didn’t work. After checking the plumbing parts, I determined that the nozzle was clogged. I followed the directions and after waiting the recommended 24 hours, I drained it after verifying the sprayer once again worked. I am happy again. I am sure that there are many treatments that work, but this one worked for me. Happy to purchase it again if needed.
Original Post