I'm 90 percent sure it's the LED and not using cal mag addatives... it's not near as bad under hps / mh but for some reason the LED really brings out the need.. that's why it's worse concentrated directly under the light... my auto ultimates too 2ml/L during flower.. my current ladies are in pre flower and they get 1ml/L Each feeding ..... it's hard to over do cal mag.... don't automatically use heavy dose but then again it won't hurt ya. Those leaves look exactly like the leaves on my ultimate when I switched to LED mid run and it came on fast... I doubled the cal mag intake and it slowed and stopped within 10 days... your is not near as bad...
I reccomend general organics if ya can get it due to its 0-0-0 rating it will not affect your current feed levels
I reccomend general organics if ya can get it due to its 0-0-0 rating it will not affect your current feed levels