Help ID Problem on 1st Test Grow

[SeaBow]

Got a question on my first "test grow" for all you pros out there.

I've got a small drip system — small tub, 5" net pots, drippers, small reservoir, and air stone. Ph runs around 5.8 and temps 70'-85' but humidity is 60-72%, my main enemy. I'm using Advanced Nutes' Jungle Juice Micro, Grow, and Bloom at the prescribed rates.

These are pics 1 month in flower 12/12 400W HPS with nutes at mL/L 132-264-396. Water cycle 7am-10-1pm-4-7 and again with lights out 1am and strain unknown.

Looking at several problem charts they first look like magnesium deficiency. I'm now guessing over watering. But who am I?
I see the leaf coloring and curling under or cupping. Can anyone give me an idea of a direction to save my girls for another 4-5 weeks until harvest?

 

[Psyclops]

Water temps need to be lowered. You can put a million airstones in your res. but if th water is warmer than 72 degrees it will no absorb O2. Hence drowning. Hope this helps.

 

[Psyclops]

Other than that they look ok to me. I would add 5ml of cal/mag per gal. to your res.

 

[SeaBow]

Thanks Psyclops,
The outside temps have dropped to near year lows for our area and the res has followed suit. The nute/ leaf problem may correct itself. A few more days may tell all.

 

[Psyclops]

Thanks Psyclops,
The outside temps have dropped to near year lows for our area and the res has followed suit. The nute/ leaf problem may correct itself. A few more days may tell all.

I am about 200-300 miles north of you so I know about the heat in this area. And you are right it has been cold of late. ;}