This product lived up to its name and claim. A week of sloshing around the tank and ten minutes of back flushing and I was back in business. My first problem in the 14 years I've owned it and it cleared up my problem in a few days , from outside my rig. No mess inside and 30 minutes of back washing and I had a zero reading for the first time in years. This product will become a regular part of my holding tank maintenance. That's one area of the Rv that you really depend on and it did the trick.Not another phony baloney gimmick,but a real solution. I'm happy with the results.