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Discussion Starter · #1 ·
Hi guys, the PPS PRO Macros recipe includes 20.2 grams of MgSO4.
Do I need the Magnesium if my tap water is hard?
My GH is 7 and KH is 7 too. Also, according to my tap water report there is an average of 20ppm Ca and 10ppm of Mg in my tap water. I do weekly 50% water changes.
 

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If you water is 20ca and 10mg, then I would say no - you don't need additional MgSo4. My RO system is currently getting 5ppm Mg added with another 1.5ppm Mg from the MgNo3 added as part of the macros.
I would say the 10ppm Mg that you have would be plenty.
 

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Discussion Starter · #3 ·
If you water is 20ca and 10mg, then I would say no - you don't need additional MgSo4. My RO system is currently getting 5ppm Mg added with another 1.5ppm Mg from the MgNo3 added as part of the macros.
I would say the 10ppm Mg that you have would be plenty.
Thank you, I am about to mix a new batch and won't be adding Mg anymore.
 
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