Please help pale, curling leaves

been researching for a couple of weeks now, because I have been having a few issues. My little ones have been having a problem with paleness, an most recently curling leaves. I will try to list the symptoms and details as best I can:

Avg temp 72f
Avg hum 47%
24 hours under t5 HO light
20 days from germination
One plant has a small insect bite that's expanded

pH 5.8-6
I am guessing because I use the liquid tests.

Nutes:
7ml pure blend pro grow
2ml silica blast
2ml liquid karma
5 drops(recently from 1 drop) Super thrive
1/2 tsp molasses
2ml nutriplus pure black

This is from my most recent watering. I also use great white. I have been getting good results as far as roots and growth are concerned but the paleness, random mold like spot, and curling leaves are starting to worry me. I see a couple gnats from time to time, could they be the problem? I am aware I could have waited a little longer to start feeding, but I am not convinced mute burn is currently my issue. I would really appreciate some help from someone with a little expertise. Thank you so much and I hope I was thorough enough. I will add photos as soon as my phone lets me

This is the only pic I was able to load. Will load more as I am able.