Yellowing, no burnt tips.

Hello!! New to the group, Kinda new to growing, really new to growing indoors. I started these in a closet, I have a tent , exaust fan , filter and soil tester in the mail..( so I dont know the PH at the moment just recently I noticed a few of my bigger leaves changing color,, wondering if anyone had an idea on what it was. I am useing a three part perfect PH mixture ( Micro- Grow-Boom). I have a feeling it could be over feeding. So I flushed out the soil with plain distilled water. , "about one leter through each pot" here is a few pics. Any tips are appropriate.

Post photos in regular light would help........lol

Lol sorry, it's the first time trying these new notes, I am mixing half of what is suggested on the bottle

also include the type of medium you are growing in.

They are in regular potting soil right now. (One two gallon and one three gallon size pots) I want to replant them in promix ,before they get to big, I am eight weeks from seed. 24h LED lite 16 -18 inches above tops. Useing three part PH perfect advanced nutes Micro-Grow-Bloom. Giving half the recomend amount every five days. so top inch of soil was dry. I wasent watering enough to get much run off, so that could be part of the problem,

I have been reading alot of stuff on here . PH tester is in the mail. From what I see I think it's either over watering or nute lock up??

For plants still in veg those colors are not to bad . Correct me if I am wrong. . N and P might be a bit high. That PH (green) is the soil sample, looks to be 6.5

Your plants look small for 8 weeks.

Second or third week of March I started germinating the seeds . They were going ok , now it's been a week or two haven't done much . Thats why I looked here , just got a test kit , ph was a little low in water. This is where I'm at now