I have about 500 plants (paphs, phrags, phals, cats, and others) under HID lights in PrimeAgra and plastic, side drained pots. Feed with MSU fertilizer every watering 125ppm (with a hose, greenhouse style, about twice a week). Fifty or so are in the new PA and are watered on the same schedule. Have not seen any problems, only great growth.
Ken Brewer