problems in grow tent!!! a little help?

Hey I have been having some problems with my 10 day old PK plants, some of the new leaves forming are yellowing small and kinda deformed, Ive attached some pictures of what i meen. I have 50 plants in 2 gallon pots in a 5x10x7 tent with 2x 6inch 600 watt hps aircooled cylinders with a 150cfm fan. also a 4 inch carbon filter on a 100cfm fan and an 6 inch 100cfm intake fan. I also have a 14 inch house fan pointing at the lights rotating constantly. the temp has been a little high between 88-92 degrees and 65-70 at nite with humidity between 20-30%. I ve been watering every 3 days(when 2 inches down is dry) and just added nutes today at 30% of the recommended amount to start off. The outside room temp is 80 during the day and 55-65 at nite. Anything would be great

THNX!

Im using soilless mix and advanced nutrients and misting everynite when the lights shutoff with distilled water.

Hard to tell with those pics, looks heat stress to me but would need better pics in order to be sure.

The pics would be best took under normal lightning, i mean pictures under a HPS lamps usualy hard to see since the light is so intense..

Xan2 said:

Hard to tell with those pics, looks heat stress to me but would need better pics in order to be sure.

The pics would be best took under normal lightning, i mean pictures under a HPS lamps usualy hard to see since the light is so intense..

Click to expand...

This mite be a better pic with my hand the leaves are small and deformed a bit and kinda droopin down but looks a bit burnt??

if they are drooping might be over watering thats what happened to mine but like Xan2 said could be heat stress too

yeah that's heat stress you gotta get the temps a little lower.

it's the white bottom its have pvc innit and it's releases a poison over 27°c 80.6 F
i have been there bro

yeah you gotta vent those lights out of your tent. you need to get your temp down

just remove the removable white bottoms and you can go up to 90°f in the tent i have i use 2 x 600w hps in cooltubes

the white bottom??? what white bottoms?

U need more than 150 cfm fan to cool those lights. anything over 85 degress slowers growth with co2 which is suppose to be run at higher temps. so image what its doing normally with those temps. The stomata which closes up above 82 degrees wo co2 I believe. The stomata I think thats the name is responsible for the plants transpiration. How it takes in co2 and releases o2 If I'm not mistaken. Not saying they wont grow but u'll have problems. try to get a bigger fan or raise the lights up. Just my non expert opinion

Stomata respond to everything
To much heat close
To much CO2 close
To much light close
Not enough water close

They usually will always open fully at night.
They will usually be open all day.

Any part of the plant under stress will result in stomata closing as stomata directly control transpiration rates (water,CO2,O2).
Basically stomata control a plants metabolic rate and therefore growth rate.

ok everybody has diff opinions on how to grow marijuana, and the sad thing is , they are all right but i have done my entire grow with a daily(lights on) temperature of about 85-90 degrees and the only problem iv had was a little bit of gnats and curling leaves due to over watering . the higher the temp the more stress the plants are under but if you dont stress them out too much you shouldnt have to worry, i havea16" oscilating fan on full and my temp is still up at about 89. during night(lights off) my temp is only about 72 ish