KushBerry Problems PICS+DETAILS

Well I have a small issue with some of my leaves.. Here's the details.

Humidity is good and temp 77 degrees stable
2 kushberrys 2 weeks veg small lsting
400MH
FFOF
1G pots w/good drainage
No nutes just superthrive every other watering
pH'd perfect 6.5
Using tap water
No bugs present
Good ventilation and fan blowing

Pictures show the problem I am having, doesn't seem to be progressing really fast or anything just want to clear it up before it gets worse.

Thanks for any help

I think it's magnesium but looking for more advice.

probably NOT magnesium. Micronutrient deficiencies are pretty rare (very rare during veg in soil mediums), and seeing that these plants are young, the soil must be fresh too and FFOF has lots of magnesium in it.
Your leaves are very very dark green which usually means too much N, but it straightens out over time.

To be honest, your plants look fine except for a slight bending and that one brown spot. Not enough P usually makes plants weak. They also grow more slowly and sometimes lower leaves may develop what looks like a dry brown spot during veg, and during flowering lower leaves will fall off and look shriveled with brown edges.
Use some sort of bloom, i.e. BioBloom, FoxFarm Big Bloom, Earth Juice Bloom, etc. and see what happens.

I use the advance nutrients 3 part... Should I use bloom then? and how much do you think? The bending is from me lsting with pipe cleaners I took them off to sturdy the stalk a little more because the pipe cleaners were like supporting it..

If leaf tips around margin start to go brown. Think cal mg. Don't think I
Ur there yet though.

Well problem seems to be getting worse... I think it's cal-mag... I had this same issue last grow around the same stage and chittownsmoke told me it was cal-mag on my sourkushs... I added 1tbs per gal and it cleared up... I just wanted a second opinion...

And for the guy who said cal-mag dosen't happen often, I don't know about that... I see a good amount of people either adding cal-mag or having problems... Don't believe everything on the net.