First Indoor Grow Yellow spots help

this is the same plant it is growing
i just wonder about the color

https://www.420magazine.com/community/threads/first-indoor-grow.184313/post-1677837

It could be an iron deficiency. Only younger leaves well come out yellow. And slowly go green. Just fix ph

Thank you Powtadaface for your time looking
I will add a photo today of that plant
As I said it is growing fast
But it is alight green yellowish
Now I didn't wright before
I do check my PH befor I add the nutrition and then
After
So I water them with a PH 6.5
It is in soil under cfl for 24H a day

Just turn to 18/6H 3 days ago
And they are growing
Now iron you say could be the problem??
What should I be looking for ??

Thank you

The way you tell is it iron is because the younger leaves that that start to pop out are slightly yellow. Iron isnt a to bad deficiency but you still dont want it. Try to find a better ph for that wont lock it out. Do you check your run off ph?

hello there thx for stoping by
i do check my PH going in 6.4 and run off is is about the same
i got EC / ppm meter didnt check befor i do now
going in 2 week veg 400 ppm @ 0.5 or 0.8 EC
when i mix my nutrients it jumps to 1600ppm so i add more water to dilute it down to 400ppm @ 0.5

i am feeding them on day one with nutrients
next i will feed them water no nutrients and then feed nutrients again

i wonder if it is right or wrong ??????

thank you

FIM'ng done today

I feed and water every 3 days. When soil goes dry. Mmj aint too good in wet water all the time. They want a dry time to. I use humbolt nutes

That was taken today. 3weeks in veg

Thank you for your post
Nice photo I will go and look at your progress
Are they outside ?
How big are this pots ?
Mine are 3 gal ( 15 L ) I ask this because I wonder how much water should that be about in liters /cc
Thank you

Mines are in 1gl pot and i use half that of water. Wait till it drys and do it again. I poor untill i see water start dripping out the bottom.

With a 3gal, I'd use a 1gal and a half of water.