Help my baby!

Hello I am in need of suggestions!! My new baby is dying! This is my first grow. Can I save here?

Too much water? I am growing Hydro - have it set to 1 hour on 1 hour off.
Too hot? Looks like the grow room is hovering around 85.
Not humid enough? Room was WAY low on humidity! Less than 20%!
Something else?

I did try and remedy - put a humidifier in there to try and get up to 50%. Turned the heater down in that room. Also change watering timer to 30mins every 2 hours.

PH looks great, between 5.5 and 6.0. Lights I think are fine. Nuts good. Please look at pics to see if I am on the right track or if I just have to correct the room and start over? Watering is the info I can find the least amount of solid answer too - not really sure how to measure with Hydro?

What are you using for nutes? Your concentration might be too high.

I am using Flora Grow nutes. I am using them as directed, very low dose at this point actually. Like 2.5ml per gallon - evenly

Hmmm, how exact were your measurements, did you mix the nutes together first or add them to your reservoir one by one? Any chance of taking a TDS reading? To be on the safe side (if no one can come up with a better idea) I would flush the system with pure water.