a couple of small yellow spots on first set of leaves

There are a couple of small yellow spots on the first set of leaves on my seedling, also those little round leaves have yellow and some brown on their tips. If it were knats would I be able to see them?

ph of runoff is 6.0-6.2
Temp is 83f
soil, ffof
150w hps
humidity, 30-35%
TV Stand, airtight 1 intake 1 exhaust with carbon filter

I am just over analyzing it?

-thanks

bump bump bump

First off how tall and how many nodes does the plant have?The little round leaves at the very bottom are eventually going to yellow then brown and die back.they are only there as starter nutes for the young sprout.I would def. watch how much water its getting which could be the cause of the yellow spots.knats wont hurt any plant as far as i know
Without pics its hard to say what could be causing it could be anything from the soil your using to how much you water to how strong or weak are your nutes.
Or just plain overthinking it.Marijuana is a weed,it will grow anywhere.most people get into trouble by over analyzing and try to compensate for what they THINK is happening.Let her grow and keep watch she will tell you shes not feeling well if you know what to look for,and knowing what to look for can only be learned from experience. Thats how i learned,mainly from trial and error.you can ask questions here and for the most part get decent answers but always remember these people arent looking at what you can see and are only offering opinion Its up to you to do the research and add the consensous to what fits for you

Its just sprouting its second set of leaves. About an inch tall. I don't give any nutes cause I'm using Fox Farms OF soil. I water when the dirt is dry 2" down. I think I'm just worrying for nothing, still to early to tell. I took pics but you cant even see the yellow because its so faint on the plant. Thanks for the response.