yellow on lower sets

Hello experienced growers, i was just wondering what would cause the yellowing of the lower fan leaves on my plant? i assumed it wasn't a deficiency since only a few leaves have been affected and the rest of my plant seems fine

.3 gal airpot, soilless, only fed once at 25%, around 2.5 weeks old, 145w led

Looks hungry.

I get this all the time because I hand water kind of sloppily sometimes and I splash around a litle bit.. The water collects there and can cause overdrying when it evaporates also wind from your fan and too much heat will do this to leaves where water collects.

I see early Mg def in the new growth.
Add a Ca/Mg product.

Just curious how you can see a cal/mag def. In the new growth. It looks healthy and a nice shade of green?

ya doc, how u know so much,lol...im interested to know how to see a cal/mag deficiency for any future problems..

do u only get those deficiencies in soil?? im guessing the hydro nutes contain all the neccesary vitamins and minerals for growing? i use GH maxi series and love it in my dwc

interesting. so cal-mag?

i recently just fed it with 50% str of GH micro and bloom (lucas formula) and there seems to be sufficient cal-mag in them hopefully.