can I have a constant flow

[mesh]

Ron, first off GREAT SITE! I cant believe I've been working with hydroponics for ten years and haven't searched out this place before. Q- I've always used the same old drab system, double buckets an hydrocorn with a drip and just need a change. The system Im going to is 4" PVC, with 4" mesh pots inserted into precut holes in the pipe. Now... can I have a constant flow just running over the roots throughout the lighting cycle or would I be better off with a timed feeding? Theoretically I would feed in one end and drain out the other with the roots suspended into the solution. I looked around the site for the answer but didn't see this discussed, if it's staring me in the face somewhere (probably is) my apologies. Thanks in advance