I wouldn't stress about the water spots. Those marks could be from just rubbing the plants together too...and I wouldn't feed, just water with your ph'd plain water and see how that goes. Don't flush, that will stress them more, it doesn't look severe, just something to keep your eye on. Perhaps it was just a tad too much for them, but in a water or two they'll need nutes again and be more able to handle them. hell, maybe they are pretty nomal for the strain you have. I don't think alarms are going off yet, soil has been very forgiving for me!
When you do give nutes again, don't give any veg nutes. I missed it, what bloom nutes are you using?

:jointsmile: Bree