Ze hoes is lookin mighty fine!! Tilt them mommas 45 degrees are even flat if you have to. That yellowing looks like a manganese or magesium defiency...(Something like that).. I experienced this when using dehumidier water..just a pointer. I know its a pain but I would switch over to reverse osmosis. (Pretty cheap at the salt water aquariuam shops)

You can lean those mommas vertical and roll em everyday..put a nice hole in the side of the pots to feed. Better to test and stress then to loose the best? I would...Anyway lookin nice..Best of growin..what you got now about 45-50 days?