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@Growforsleep, Thanks for you reply!! This is crazy, i've started using Dual part coco and i get cal-mag deficiencies i've never had during veg, if i mix nutes in anything less than 250 ppm cal-mag they develop white spots by the next day ;( i love the product and how the PH holds for 1-2 days but can't seem to get dosages right.
@Matjf420, No, apparently the DualPart has enough calmag to sustain it as per the instructions, but I did buffer the coco with calmag before planting as cocoforcannabis site suggested it.
So in the end I didn't have any deficiency symptoms and everything went great.