I have been having consistent issues in my garden with what I believe are cal/mag deficiencies.
Soil: 25%FFOF, 25% Happy Frog, 50% peat&perlite mix (also added 2tbs lime/gal and some EWC)
Light: 4' 8 bulb T5 about 4" from canopy, temps are 75-82
*RO WATER*
I give 5ml botanicare calmag with...