Yellow spotting

[Riptidedd]

Hi everyone ! I'm new, I just started a grow after it became legal in my state and I've run into this yellow spotting issue on one of my plants samsquanch og by mephisto genetics. My conditions are as follows:

Just entered early veg
65-67% rh
900 ppm co2 enriched
81 day/72 night (led lighting ambient air temp)
Hlg led lighting
15 gallon pots mixed with coco loco, ocean forest , and pearlite 1/3 each plus beneficial myco blend and azomite for trace nutrients.
Watering started by misting 3x diameter 3x deep abd recently switched to watering can deeper watering and wait till it dries out. (EDIT) Ph around 5.5 -- is that the issue ?
18/6 cycle
Was in 260 par lighting but moved to 212 par intensity on suspicion this was light related.
Just started feeding at half strength prescription blend 350 tds . Have done one feed and one water follow up so far.

Any ideas what I might be missing or what I could do to correct ? Will it spread to the other healthy ones?
Thank you so much!

 

[namvet25]

I would just give her plain PH water with a little cal/mag.She should have enough nutes in the soil mix for a couple weeks. so don't over feed her

 

[Bill.de.Cat]

With the OF in there shoul be good for 3 to 4 weeks without nutes, and I use 6 to 6.5 as a pH for soil. From what I'm seeing in the pic it's about 2 weeks old so the water only for another week or two is a good call.....Main thing is to not stress too much over little changes, they all have their lil quirks.

 

[TrichomeAssassin]

FYI: Coco Loco is to be treated like soil with ph 6.3-6.8

 

[Riptidedd]

Thank you everyone !!