Leafs Clawing

[serfhunter]

I am getting some clawing on some fan leaves. any suggestions on why this is happening?

Any help would be much appreciated.

 

[BigCube]

Specs? Normally clawing is temperature or watering problem, but can also be co2 problem.

Some system specs might be in order to get a more accurate guess.

 

[serfhunter]

Thank you.

It is Black Jack

 

[Jimster]

Did you do anything that migh have caused this, like a recent feeding? I have seen severa; pposts over time that mention similar issues appearing suddenly about 2 weeks into flowering. I think it was determined to be a nutrient issue, probably an imbalance. When leaves "taco" upwards, it is usually heat related. Taco-ing downward is somewhat new to me except in cases of possible nutrient burn and insect damage, such as spider mites, which I didn't see signs of.