Quote:
Originally Posted by mark
need the Mg as IO is low in that as well, and hard to balance the Ca if the Mg is low.
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+1
if you just add the calcium to IO salt water you will likely just end up w/ precip, and never get your calcium 400+ ppm.
Add 180-200 ppm of magnesium, then you can easily add 50-80 ppm of calcium to IO.