Thanks for clearing that up @pop22. It was a case of mistaken identity by myself. I thought the OP was @Ryno_nuggsI believe that the OP is using the one part MCIII, not the two part. Would not be my choice any more either, but it works well for lots of growers.
Part B is loaded with nitrogen. You do not want to start dumping more part b in it for extra calcium, or it with throw the nutrient ratio all out of wack. You can end up with nitrogen toxicity which can lock out other nutrients, calcium being one. Ideally a straight Calcium product would be best, but calmag seems to work well with this combo.The 'Part-B' bag is Calcium Nitrate. I think that's much better to treat Calcium def in stead of Cal/mag. Which also has Magnesium Sulfate in it.
