The CALiMAGiC has a low PH. It uses Phosphoric acid to get the Calcium Carbonate to go into suspention. Keep that in mind if you use it.
What are you warning against? Mixing into concentrated reservoirs? Throwing off Nutrient Ratios? Precipitation at normal hydroponic pH ranges?
I still have yet to use it, but if/when I do so, the plan was to add CALiMAGiC to my RO water first, which would add alkalinity via carbonate, and I'm sure drop the pH as well. Then I would add Micro, Maxi, or Jack's, and follow by adding Bloom or CalcNit depending respectively. Obviously waiting for each to dissolve/mix completely before adding the next. Would this create an issue?