Odd leaves,, anyone help?

Coco bean

Member
Two weeks into veg and plants are growing great,, but about half have now developed a couple of weird leaves,
Was wondering if it was over / under watering but surely this would affect the whole plant not just a few leaves and I haven’t altered their feeds. 52DBD9B8-D999-42B9-B898-DA5F4AEF3D00.jpeg
Growing hydro, all nuits and ph in range, 250 lights on a 6/2 split being watered twice a day on a 12 hour split.
 

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What is your temperature in the tent? Do you have an exhaust fan and an intake fan? What type of light are you using?
 
What is your temperature in the tent? Do you have an exhaust fan and an intake fan? What type of light are you using?
Temperature is 24/25,, have an extraction fan which is connected to the light box to take heat out,,using MH lights on 250,,
 
I don’t think that is a heat issue. 24/25 is a great temperature.

The discolouring on the leaves is that only on the top leaves or did it start on the bottom leaves?
 
I don’t think that is a heat issue. 24/25 is a great temperature.

The discolouring on the leaves is that only on the top leaves or did it start on the bottom leaves?
It’s just on random leaves, about 2 or 3 leaves around the middle, new growth seems fine. They have a slight shiny look to them and just start curling, I touched one and it came off in my hand, I am clueless.
 
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