I'm looking for a source for micro nutrients/trace minerals to add to my base salt mix. For anyone curious, the recipe is below (for a 100x concentrate, per gallon):
B - Magnesium Sulfate (Heptahydrate) MgSO4.7H2O 191.958g
A - Yara Calcium Nitrate Yara_Ca(NO3)2 265.287g
A -...