¿Qué problema tiene ?

PH issues for sure, what is the soils ph? what is the runoff ph,? what is the water ph? what nutrients are you feeding? and what soil medium are you using?

If your lights are not too close thats Mag def. Taco leaves AND yellowing is pretty much always Mag defic in coco. Get some cal mag on her and she will be fine.

There is limited information, but from looks and taking a educated guess I think your light is too close. The hot spot on the plants is causing them to be warm and leaves ate starting to taco. Plus the yellow on edges looks like light stress. Vegging requires less light. Dim or move farther away from plants. Intense light is needed in flowering. That is what it looks like to me. Good luck 🌱🌱