I don't use calmag if using tap...you need to find your city/County water report and see what it carries...you could have enough in your tap...could also be the reason the leaves are curling....cut the calmag out...and see...I use a fish bubbler and pure vit c powder to treat my tap...now if...
This is my grow I have going under the fc3000 atm....3 Russian Queens and 4 Purple Domina by Laughinghyena seeds formally Beaver Genetics .....all in one gallon grow bags on homemade bottom feeders...in growers coco and megacrop nutrients.....
I just pulled 12 oz off a single auto Za Mango....grown under the fc3000.....for half of its life till i moved it to the big 5x5 ac infinity tent and HLG650R with a uva bar....