Hi all,
Perfect, just add a small amount of tap (~10% by volume) and that supplies calcium (Ca) and dGH : <"Solufeed 2:1:4 - IFC - low on P,K,Ca - user error?">
"Mg / L" and "ppm" are equivalent, so 10% tap addition to 90% RO gives you 10 ppm Ca and 1 ppm Mg. If you want to work out the dGH...