Another clawing problem- can someone help

All four of my plants are in a soil mixture consisting of: 1/2 Peat Moss; 1/4 Top Soil; 1/4 Pearlite.

I Use GH Grow/Micro/Bloom.
PH is approximately 6.0 (Use liquid tester).
I water approximately every three days
Nute-water/plain water/nute-water/plain water,etc.
Temperature ranges from 68F-74F
Have large double-fan intake and large exhaust fan.
3 Gallon pots
Not sure what ppm is.

Use 1 400W HPS
Use 1 20W (Equiv 100W) CFL (Support light)
Use 4 23W LED (Support light)

Plants almost look like they are under watered, but that isn't the case... they were watered this morning @7am (regular schedule) - 1 hour before the lights came on at 8am. These pictures were taken at 2:30pm (6 1/2 hours after lights came on and 7.5 hours after watering).

Here are the pictures I took a few minutes ago:

they look root-bound and over-watered to me. what size pot?

scroglodyte said:

they look root-bound and over-watered to me. what size pot?

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what???????

dude, you said the problem, you have no idea what the ppm is. those plants are showing the most traditional sign of too much nutes as it gets. i dont do soil but i believe you want the ph higher, around 6.5 or so. you are frying them.

ppm in soil?
3gal pot..........5ft plant. flaccid CURLED leaves. not clawed. i do soil. he's got some N abundance......i'm sure. very dark green.

I think it looks over watered as well. Possibly too strong of nutrients also, but watering every 3 days seems a bit much to me. Make sure you let your soil dry out between waterings.

scroglodyte said:

ppm in soil?
3gal pot..........5ft plant. flaccid CURLED leaves. not clawed. i do soil. he's got some N abundance......i'm sure. very dark green.

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So, what do I do to fix the "N" abundance? Raise PH? Cut back nutes? (I use a regular schedule, as given by GH)

(For everyone who thinks it's too much water: I have heard this from a few other people on other sites also, but most say that I should have spots/yellowing - either way, I'll let the soil dry out completely - Unless "Scroglodyte" knows the exact remedy, and it doesn't include drying everything out.

heathmalc said:

So, what do I do to fix the "N" abundance? Raise PH? Cut back nutes? (I use a regular schedule, as given by GH)

(For everyone who thinks it's too much water: I have heard this from a few other people on other sites also, but most say that I should have spots/yellowing - either way, I'll let the soil dry out completely - Unless "Scroglodyte" knows the exact remedy, and it doesn't include drying everything out.

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Definitely let your soil dry out between watering. You don't want your roots sitting in water all the time, that leads to root rot and other bacteria, and also starves the roots for oxygen.

just feed and water less. i think that pot is too small, but have to live with that now.

I'm going with over watered also!

drooping is a sign of under water/over water and dark green is to much nitrogen, leaves dont showing discoloration in over/under watering

pot size? + put Ph to 6.8

Pot size is the same size that I have used for all my other harvests w/o this issue. Also the same nutes & schedule for watering. Same PH - although I am thinking of raising it slightly, as most respondents who do soil are saying the PH is too low.

The major changes that these plants have, as opposed to the other two grow rooms (same strains), is that this is a new GR, with a more abundant clean air brought into the room by a much larger intake. The air that is brought into the room in approximately 66-73F, the room stayed at about 70-75F (mostly on the lower end of that scale). I have remedied that by adding a heater-fan that comes on every two hours for 45 minutes. The overnight high/low was 83F/71F since adding the heater last night. I'm thinking the room was too cool with the amount of fresh=cool air that came into the room (still the same, only heated now), and left the room through a much bigger exhaust than the other two grow rooms. The Humidity was much lower than the other two rooms also, but it has jumped about 10% (to 55% relative hum) since last night when I added the heater, and a half-gallon bowl of water (sitting on floor of GR). The last major change from the other two grow rooms is the use of 4 L.E.D. lights, used for support to the 400WHPS, and a 100W equiv CFL, also used for support. My wife seemed to believe that the LED lights may have caused the issue - I am not in agreement with her, as I can find no precedent that supports the theory.

What does everyone suggest I do to lower the Nitrogen - if that turns out to be the problem?

Cannbosh said:

pot size? + put Ph to 6.8

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pot size is between 3 gallons and 4 gallons. Two are exactly 3 gallons, two are approximately 3.5 Gal.

Okay, so I moved the plants into a smaller GR (4'X4') which is easier to control the humidity, which I raised to 75% for 48 hours, then reduced to 60%. I also skipped the scheduled watering. The plants seem to be responding well. I'll update this thread with new pics in about a week.

Here are the current pics: