Hi In my pat grows in Peat Moss CalMag was one of the favorite micronutes My last run was my first time I used coco for medium. My ladies had Mag deficiencies every time until I started using Epsom Salt. This time I wanted to get things right. I got House and Garden coco A and B as a base but debating if I should be using CalMag along with it or just a bit of Epsom Salt and scip CalMag all together. What do you guys think?