My wife and I have built a home in the mountains of Western Maryland with the materials from two log buildings from 1790. It is beautiful, easy to heat, and very homey.
The problem is stains in our toilet bowls that are almost impossible to remove. Our well water had some iron and sulfur that we have corrected with the appropriate and somewhat expensive filter systems.

What can we use to safely remove the stains and not harm to our septic system? Plumbers up here have told us some things to try, but none have worked. Do your experts have any thoughts on this matter? We are desperate at this time to find a solution.

I thank you in advance for any ideas you may have.
Sincerely yours,
Neal Redmond
11601 Ziegler RD SE
Hancock, MD 21750