Can anyone help me out??

hit us up when you find out the rh.
I use the FF line and soil...ime I dont think its a ph issue. FF soil is good about buffering the ph.
Now this could be some patches from high humidity...Ive seen this happen in my cloner under dome on leaves, starts out like that then turns to dead patches as it ages. Ask youself, did any water drops get left on those leaves, possiblly...
Need to get some exhaust out also...small spaces...heh, any grow space needs a dehumidifier
It also looks like a pretty big patch to be thrips, but check anyways...they hang out inbetween nodes and hide really well. They have 3 diff looks as they mature..starts out as a flier, then a transparent looking long bodied fly then a black n tan soft shelled beetle. very tiny hang out in the nodes and soil

did you misted em,water em? and spill any on the leaves? other than that I'd say D666 is on right Track...check everywhere and sit watching em for 5-10 mins...also use a Scope to check up close if you can...undersides of Leaves..

atb

Hope You sort..

I'm still not sure if it a humidity problem because I live in Fairbanks alaska and it is very dry here, if anything I would think I'd need a humidifier, and about an exhaust I know I need too get one set up I'm just not sure on how I'd go about setting it up because I am in a rental atm @Diabolical666

Also how Close is your Light to Tops..and when you transplanted(potted-on) did You water in...

atb

Yes when iv watered them before water has spilled on the leaves a little bit ! @cc2012

The light was really close too the tops when first set up but just raised up a bit this morning when I noticed a problem and yes I watered it when I transplaned @cc2012

could just be "burn" then? idk...baked at the moment, just keep an eye on em...

Seems like your tripping about nothing. Just wait. I would add a lil cal-mag but thats it

And I also used a scope to search the underside of the leaves this morning I couldn't find anything at all besides the tricromes under the white spots had white head but everywhere else had clear heads @cc2012

yes I maybe I just figured to ask before it developed into a bigger problem that was what I was going too do was use the cal-mag that @deadgro suggested! @Daggy