These ladies were fine couple days ago no sign of leaf damage, I fed my plants lastnight and tonite I seen three plans in particular with these spots, I'm always mite scared so my first reactions is bugs, but also wanted some of the forum insight on these pics, I stared very hard under the leaves of these and found nothing.
looks like early calcium def , take care of it with cal-mag while its early Violeta Dwc Mars 300 (Purp Grow)