What is this on the leaves

Water with nutriënts sspilledon the leaves?

Curling downwards on your top growth points out nitrogen excess, 1EC is too much for this size. I bet this caused some ph fluctuations around the root zone. Give it a nice flush with mild strength nutrients and go on from there. Hope this helps ! best of luck

Hello i think you have calmag deficience. Your ph is good and your ec too so try ro correct calmag with epsom salts or calmag additive. Good luck.

Check your runoff waters ph and ec levels. Likely lockout happening. Just need to figure out if it's ph or ec. I don't know the age of your plants so I can't say what levels you should be at. If you need help with that, you can contact me directly.