Hi schtiggy, it's always fun to watch plants recovering. Of course growing cannabis is not easy at all that's why expert growers are also called chemists. They have the complete knowledge of compounds found in flowers and also know how to manipulate their ratios and strength.
Only an expert...
Hi Schtiggy, glad to hear plants perking up. Cal-mag has nitrogen which probably help. If your lamps aren't producing any heat then light is not an issue. How many hours of light are they getting?
I am currently growing auto lemon og haze and bubblelicious in 3 gallon pots. Watered them every...
Looks fine. If i was in your place i would start feeding them something like a mix of ffof big bloom and grow big. i am not sure what else could be the problem maybe not enough light?.
Plants need at least 5-6 hours of night time. Leaves start to wilt after 18 hours of continious light which is a clear indicator when to turn off the light.
Seedbanks also recommend to keep 18/6 regime during entire grow. Hope it helps.