Quote Originally Posted by Xevious2001 View Post
I have now changed the filter twice in a few days and both times the water in the filter chamber was quite brown and the filters themselves had picked up quite a bit of brown material, so there is clearly some minerals or something in the water.
It's iron.

There are apparently some low-grades of salt that contain quite a bit of iron, being sold to pool owners for pool use. If there's not iron in your well water, then I'd check the salt out as a source.

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