Are those tsp? Nvm. I feed those at 5, 4, 7.5 mL/gal in bloom and your #s are about 3.2, 2.8, and 8 ml/gal. So I think you are probably ok for feed, under not overfed if anything because you don't have burnt tips.
In the original pictures it looks like the leaves are swollen, like they are overwatered maybe, or like they can't transpire from either too low or high humidity or too high temps. This is why I suggested making sure the fan isn't blowing directly on the canopy - your leaves don't look windswept but high airflow can prevent transpiration.
Problem is with plants, and I'm sure you've already figured this out is that many different causes have similar symptoms. The yellowing in between veins on the leaves for example could be caused by underfeeding or by lack of nutrient uptake due to inadequate transpiration or root problems.
Imo, check of easy to do things first. Make sure your pots are dry before you water, this is super important because roots need air. Do the lift test or shove your finger in to the second joint. Overwatering is my favourite way to kill houseplants because once they are overwatered they stop taking up water and if you keep watering at the same frequency then the problem compounds.
I am not an expert on quantum boards, but I agree with coreywebster above that maybe they are getting too much light 24h vs 20h maybe. I see this a lot, but sometimes my plants get right up to these 200w lights and the only problems I've ever had are crispy leaves. It is 400w in a 2x4 space and I like them about 8" from the tops btw. Again, I'm not an expert on qbs and don't know how hot they get or their radiation pattern, etc.