Flowering Week 6 Leaves not Looking Normal Rolling Up and Down

This is my first post. Hello everybody.
I think I have a problem with my plant, she is about 6-7 week of flowering and her name is Pammy .
I use fert. Canna Coco A and B same quantity from beggining, the plant grew great until now...
The small leaves from top and also some bigger are not looking so good, no spots or stuff like that but they are not normal extended, they start rolling a little to up or down. Look at the pictures, I don't know how to explaine, my english is not so good.
Things I've tried in the last 3 days:
I put the light far away to eliminate the high temp posibility.
I put less water to elimitate the overwatering posibility.
I put another fan for more air circulation.

Light is 400 watts

I don't know what to try next...

Can anyone please identify the problem ? I'm a little worried.

Thank you,

okay not the greatest pictures, but from my view it seems like they have been given a bit too much fertilizer as I see what appears to be a bit of nitrogen "claw" and ur leaves r really dark green. as well what are ur temps because the leaves are turning in a manner of which is consistent with them trying to diffuse some heat...so I think heat still may be an issue.

Temp during light is about 25-27 degrees at the bottom of the plants(there I placed the thermometer) and about 20 degrees when light is off.
The light is tube air cooled.
The heat issue is strange because I have another small plant near the big one and is the same height but she don't look to have any problem from heat or light, it grows normal., normal leaves.
Should I try to put only water ?