How close to the plants do you have it? You're only at 10w per square foot the buds will be super airy fluffy. And may not even form right.
Edit: and that's 100% Mag deficiency. And you have the claw. I wouldn't give them calmag. Go to a dollar store. And buy a bag of Epsom salt. It's pure mag. You dont need anymore N. If you give them calmag the clawing is going to get worse. Mag deficiency will cause N lockout. Then adding even more N with the calmag, and the magnesium starts working you going to get N tox. Surely you got enough change for a 2 dollar bag of Epsom. .1 dry gram per gallon of water to start. May have to bump it up to 1.5g per gallon.