Problem i think

i have noticed these marks and would like a opinion if you have some ideas i would appreciate

your views
oh and the curling over on the tips off the leaves too

I would back off the nitrogen a bit, the leaf curl
Is the indication for that. The rest looks like a bit of nutrient burn. Just watch your ppms, and give only water a couple of times, and she will keep going.

Thank you I will try that

can i learn about nitrogen and other stuff the plant needs from a vidio and if so can you point me in the right direction please