Whats wrong with leaves +rep

Here's a little history of the plants. Have been growing for two weeks in fox farm ocean forest soil. Vegged for 1 week and been in flowering for 1 week now.

This has been happening for about 4 days in flowering now. I am running a 600watt hps on her now, aired cooled. Temps have been high lately like lower 90's but am running co2 to them

These plants have not been fed anything except for normal tap water once daily in the morning for them. All my other plants are fine and growing very healty all plants are around 5-6 inches.

Also if this helps the plant that has the curled and burnt yellow leaves is still growing at a steady pace as the others.

Pictures.








By the way this is just a normal bag seed grow.

Thanks for the help.

they look like they have to much heat stress

The edges of your leaves will raise upward when they're trying to release moisture because they cannot deal with the heat.
Get your room down to 82F with that co enrichment and you should have some happy leaves again.
Since it is a bag seed grow, I assume you will have a variety of plants, which will prefer a variety of climates. This can explain why one plant is reacting violently to the conditions and they others are still just stressed.

Cheers mate

Any ideas on how to keep the heat down? I am running a 600w cooled, ducting is running from the closet to my other closet which is pulling AC from this room to try and cool the light.

I have a 420cfm inline fan pulling the air and little 6 inch duct fans in the ducting keeping it moving and still hot.

Do you think its just due to the temp outside has been around 90?

Any other comments thanks.

The heat was brutal last week

Can you move the ballast into the other closet, and run the lights from there?

moving the ballast is a good idea, do you have glass on your hood to keep the heat in so it gets sucked out more efficiently?.. that is another easy fix. also, sharp bends and long distances can really reduce the airflow with inline fans, but if you have fans in the ducting then you're on top of it.. Just make sure to intake cool air at the bottom of the space and vent hot air from the top if you can...

I have the ballast in the attic behind the closet already.

Yes there is glass on the hood, I think the problem might be the ducting is to long. It's about 30 feet of ducting to go threw + a hot ass attic. I bought insulated ducting to try and keep the air cool when running threw the attic.

I don't know maybe its just the heat outside is to much, normally im hitting around 82.5 and this week im hitting around 90-93