Thrips?

what's the bottom of the leaves look like? I can't tell, but if ur pretty far along in flower, i wouldn't mess with it. Twisted leaves might be some other sort of mite problem you cant see., like spider mites. You might see black shit dots, that's bugs too. One bug won't kill you but if you got an infestation, address it in veg next time. Be glad you aint got bud rot. If ur infested and close, take them down early, otherwise you'll be picking bugs off every leaf on each plant. Neem works good if you start it early and stop before flowering begins. I'm organic, using crab meal, oyster shell flour, both have chitin in it, creating a hostile environment for the little f ers. Overwatering will cause bug problems too. If ur growing hydro, i cant answer your question. I don't know s hit about hydro. That's my best guest. but keep in mind, i'm a rookie and the information you gave is at best sparse. Hope this helps!

Hey bro! 👋 Most likely, it's a heat issue. If the leaves are curling up at the tips - that's heat stress! The plant is really hot, and it's showing you that with the tips of its leaves! Solution: 1. Raise the light higher or limit its power. 2. Increase the airflow in the tent. 3. Direct the fan airflow along the growing tips of the plant, but with a slight upward angle! This way, the fan will capture the air coming from below, where it's cooler, and direct it "upwards" towards the light, where it's warmer and will exit through the exhaust fan! 👆 Good luck, bro! ✊😇