I want add to ro-water mgso4.That will be 5ppm Mg and 1 Gh.
I want too add to ro-water k2co3.That will be 15ppm and 1,5 Kh.
I want too add to ro-water CaCo3.That will be 4 Gh and 3,5 Kh.
That will be 5ppm mg and 15 ppm K and aproXimetly 5 Kh and 5 Gh.

What do you think?