Please help?

When watering with nutrients always use %75 strength along with 5ml per gal of Cal-Mag Plus. This should fix most issues and I will go even further and say every third watering use straight RO. For the most part they look fine :) FYI: Please don't flush with PH of 5.5. Always use straight RO (PH 6.2)

Yes, early magnesium eficiency, not iron deficiency. Magnesium sulphate will cure it.

If it’s on the top leaves/new growth it most certainly is not magnesium but iron deficiency. You need to bring the pH of your media down (flush with 5.5 water) and water less but more frequently so salts don’t build up in it as they are frequently flushed by the new water. Good luck!

Looks like. She doesnt look dark, like other plants, so its not from excess of nitrogen. Thats good. Epsom salt as fastest way to correct. Or calmag , most work slower. In soil i had it most of time from wrong watering regime, pot stayed too long or watered too early again and sign were showing up. Long time keeping soil moist can play with pot ph.

Magnesium or ph. Likely the 2 possibilities.