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post #7 of (permalink) Old 08-05-2020, 08:41 AM
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A quick run of the Rotala butterfly calculator shows that 40 ppm of Ca should get you to about 5.7 dGH - so it seems like you won’t have appreciable Mg in your water. I think swapping out the CaCl with Equilibrium on future water changes is a great idea as it has about 4:1 Ca:Mg. And is a good source of K like @Asteroid mentioned too.

Last edited by P.Isley; 08-05-2020 at 08:43 AM. Reason: .
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