"xtr396472" wrote in message ...
I see I can add Mag sulphate to raise my GH but in the text it says this
introduces sulphates. What is the problem with having high sulphates and
what limit can I have
Thanks

I've found plants growing in warm sulfur springs. I doubt there's much
of an upper limit unless you are adding a great deal of
SO4...........plants take in SO4 as their form of Sulfur for
nutrients.
It's very common in tap water with any GH.

Regards,
Tom Barr