@johannpiber my water is brown because of the high amount of iron. It colors everything brown, toilet pot, bath, sink. You can taste it and smell it. Like should be lime/chalk. The amount here is high too and it ruins boilers, taps, you can see it on the earth after it rained and dried up.
Sorry but my keyboard loves to change words automatically and esteem even deletes words. I do not know how to solve that problem.