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Re: Effects of SO4

Hi Tom thanks for the info.

BTW tap water in Vancouver BC has <1dGH & <1dKH. 
Which is why I add CaCO3 & MgSO4 to my regular water

> >At what concentrations does it become lethal?
> Pretty darn high.
> If your GH is above 3-4, you very likely don't need
> to add
> MgSO4. K2SO4 is fine. You will be unable to cause
> much issues
> with K2SO4 unless you go nuts, don't change the
> water for a very
> long time etc.
> Regards, 
> Tom Barr

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