I’ve got 6 plants in a DIY DWC tub showing signs of something.. anyone got any ideas?
I wouldn’t worry about a few blemishes here and there. Your plant looks super healthy.
Leaves get damaged from spills, nute splash, etc. Couple spots no cause for alarm. Plant looks good.
It cant be spills, no liquids go over them and they were fine at lights off.. I’ve been getting at least this many the last few days
You get that many per day turning?
You are going to be very frustrated if worrying about minor blemishes.
No need to worry. You plant is doing great. Keep doing what you have been doing.
I dunno.. maybe. I havent really been sleeping, and I have no concept of time. Could be every couple of days
Amen!!!
You have enough leaves to lay on top of each other, which can cause condensation to buildup between them. If the excess moisture doesn’t evaporated quick enough, it will result in a small soggy spot on the leaf and the spot eventually dies causing a blemish.
My thoughts as well 
All the leaves I find like this are on the very top layer, and the ones underneath them are fine.
Should I trim som of the larger fan leaves on top that are blocking light from reaching lower leaves?
Trim as necessary to maintain good airflow within the plant’s canopy.