I started seeing some yellowing leaves.
Went to buy some food graded Epsom salt and added it to te feeding schedule.
Ordered some Sensi calmag extra. Apparently when filtering the water with reversed osmose, there is a good chance this deficiency could arise.
Seems like you're doing a great job. Seeing as how these probably aren't growing very much taller, might think about lowering the light and tying down some of the taller ones to get as much light through to the lower buds as possible.