Strange shape on leaves

No diary, no real information = impossible to answer in a meaningful way. Plants are waaaaaay over fed for a start though.

Looks like your temps are getting too high by the tacoing of the leaves. Plus the feed is too strong by the dark green showing in leaves. Without information to look at it makes it a lot harder to diagnose fully.

Hi bud. That could be due to multiple influences. Without a diary or more information, it's hard to tell for certain. Improper PH, excess of nutrients, overwatering, under watering, nutrient lockout, plant is stressed, strain specific, genetics.... the list goes on.

Please describe more about your setup and everything.