I understand the relationship of the big three and the general acceptance levels and ranges. I keep hearing and being told, also am seeing it in my tank, that mag needs to be steady before cal and alk fall into line and hold steady.
I mag the more "necessary" one to check? Is it the one that could/should be dosed more often?
I mag the more "necessary" one to check? Is it the one that could/should be dosed more often?