Unnecessary flushing?

[greenpassion]

In reading older posts on flushing, it seems I have been creating way too much work for myself. I have 22 orchids in S/H, and I have been flushing (now with RO water) once or twice a week, and finishing each time with a solution of Rays fertilizer made for RO watered plants. This takes me over an hour, and I use around 9 gallons of water. Is it ok to just flush once a month or so, but refresh the reservoir with the MSU water weekly? Thought I had this down, but apparently not. Another thing I 'caught' was that some of the phals I originally put into S/H were WAY over potted, which causes the plant to have to spend months trying to fill the container with roots. Boy. It never ends does it?