sir_isOanswered grow question 4 years ago Looks like calcium to.
It kinda annoys me that people always say "Calmag", while often useful, I find it too vague and calmag supplements are often biased towards magnesium (relative to natural ratios).
So I'm not saying calmag, I'm saying calcium mainly. I mean, if you're using calmag, I'd lower that a bit and substitute some of it with calcium.
But then, I'm kinda guessing.