oz,
the power grower is always running, acts like a drip system
http://www.generalhydroponics.com/in.../powrgrwr.html
if you would like to see exactly what I'm working with.
EC+/- 1200
85 degrees f.
using a Sharp pH microprocessor which is calibrated at 7.0 once or twice a week.
50% humidity
most of the larger fan leaves were removed just after the transplant. the rest have at this point fallen off, I am basicaly working with a stem about 2.5 feet tall, with well developed leaves tightly huddled to the stem. and from the mid section down there mostly yellow.