Grow tent usually at 82 degrees

[SecondTimeAround]

2 plants growing in coco coir (5 gal cloth grow “buckets”)
I use the Fox Farm trio of nutes (currently only the 2 for vegetation stage)
I have a 2 x 4 x 6 grow tent
Currently using a 300w LED
I have an oscillating fan and an exhaust fan in the tent
I use a small humidifier in the tent

My 2 plants grew really well for several weeks. I raised the 300w LED to 18” above the tops and tried a second light for a few days but the tent got too hot. The plants stopped growing but didn’t die. The leaves looked like they might have a nitrogen deficiency - bleached and yellowing from the bottom of the plants. So, I mixed a packet of Knox gelatin in a quart of water for the next scheduled watering and 24 hours later they looked great and looked like they were growing again. Now 4 days later they are back to looking blah. Help please.

[Mr.furley]

Hi STA,
at what dose and how often are you feed? How old are your plant? And most importantly what your PH levels going in and out, 82f is ok for you veg stage.

[D.A.A.S.69]

Yeah STA, you might want to give a little cal-mag too.