Unfortunately, my opinion of Clearwater Systems Meadville, PA is not good. They put in a whole new system for me in January and I'm not happy with it. They know that and have been out multiple times to help diagnose the ongoing problem. I have a ring around my toilet that they assured me would be resolved by the installation of a new system. I spent four thousand dollars with them, but the ring is still there. Now Clearwater Systems is telling me that the toilet ring is caused by my well and I should shock it with chemicals. But I am reluctant to shock the well water. I drink that water and so do my grandchildren. I wouldn't want any of us to ingest chemicals. Clearwater Systems has not attempted to resolve the problem any further.