Don’t worry.... what ratio is the calmag? N-P-K wise that is... Your plant has tons of healthy leaves so I wouldnt worry yet unless it starts spreading fast. Just keep going with it and maybe increase the cal/mag by 25% IF it doesnt have much N in it because you definitely dont want to use to much N in flower. Your plant looks fine and a few off colored leaves arent a biggie just watch it and if it gets worse even with the bit extra of nutes then post a follow up.
Also heres a good link to bookmark.
http://www.growweedeasy.com/marijuana-symptoms-pictures
NPK is 4-0-0
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