For future reference, if you ever need a single element to add I've just seen that canna do these
Not exactly cheap but will do the job needed
I wonder if I could just make it by boiling it into the water, I would think there needs to be some sort of more stable isotope, there's 2 in nature, another is radioactive. I didn't know Ca+ was available in a standalone with available uptake. Usually salts are more soluble in H20.
Calcium has six
stable isotopes, two of which occur in nature:
stable 40
Ca and radioactive 41
Ca with a half-life = 106 years.
I'm thinking crushed up eggshells, with a tad of vinegar, and heat should do the trick for much cheaper $$$
(I eat lots of eggs).
When
calcium carbonate comes in contact with
vinegar which contains acetic acid (CH3CO2H) a chemical
reaction occurs. ... 2 CH3COOH +
CaCO3 = H2O + CO2 + Ca(CH3COO)2.
CaCO3(s) + 2CH3COOH(l) Ca(CH3COO)2(s) + H2O(l) + CO2(g)
But need to get my molar masses close, so I don't have extra vinegar, or inactivated calcium. Probably bake the eggshells in the oven first.
I'm thinking there's several nutrients that can be fashioned on the cheap this way, if I can figure out which the best ones are for uptake. Most of the metals should be pretty easy, I would think. Sure would be nice to have each and every one of them, in an active form, for immediate uptake, on demand.
Some of those, a few grams should last years for most people.