Looks like underwatering to me. How often how much are you watering them?
That sounds fine. I don't have a lot of experience myself but it could also be too much light at the canopy
Heres a couple of a leaf, will get a lights out shot also in few hours View attachment 4858275View attachment 4858276
Np definitely worth checking.I havnt checked the ph of my run off before i will do that tomorrow morning thanks
What does a high/low run off ph indicate?
If the rest are ok .. idk maybe you just have a picky pheno there and everythings ok