Leaf Curling - Not sure why - Help!

my plant seems healthy and strong but I noticed some of my leaves curling some what. Any ideas what I need to do or not do?



she's at fourth week of veg

This looks like Lack of Oxygen and excess salts at the root zone and it will make your leaves thicker Hence the curling down. It also depends on drainage and such or oxygen levels in Hydro .. But some strains are hypersensitive and will throw the same fit with excess nitrogen ..Usually Land Race Sativa's and there offspring will display such but I dont see that above as I notice excess leaf tissue and salt builup ........ What you can google under cannabis is leaf clawing . There are hundreds of images and write-ups

I have an airstone at the bottom as well as run the bubbleponic 30min on, 30 min off. Using advanced nutrients products

the clawing, along with the dark green color are saying too much nutes.

That was my line of thinking......will change reservoir water & see.....

Leaves that curl downward is something to do with the soil, nutes etc. Clawing or curling upward is atmospheric meaning heat, light stress etc.

upward movement of leaves is referred to as taco ing and is heat related.

check ur nutes man too high ppm

I hate people who ask for help and just give pics.. what medium or method are you growing? Nutes? PPm? PH? Soil? etc.. I mean we can make a wild guess but most of the time that is what it will be with the information missing just a wild guess.