Where was I being a smart-ass? I'm looking for help and I appreciate advise. I didn't do a background check on you prior to asking you about your experiences. Sorry, if your reputation didn't precede you.

I checked your journal (prior to your response) and didn't see a description of your tub. I didn't read all 52 pages though.

I'M NOT ARGUING WITH YOU. I'm honestly looking for advise. I MAY not take it . . . but I'll listen. Mr Green used the same tub in his grow-video and I was planning on doing the exact same thing. You used orchid pellets in individual square pots (if I remember correctly)? Is having the ability to move them important? I had planned on simply filling the tub with pellets and using the large RW cubes.

I can see where the plumbing would be a bit exotic. Let me explain how I was thinking it should work. Each mix-tub (3 probably) would be plumbed to their own pump. I could zip tie the pump line and the return line together and drop them in the res. Each pump will be on a separate plug timer ($10ea). That way I'll only be using about 5 gallons of fluid from the reservoir at a time. When it's time to flush or go half-nute, I can simply drop that pump line into a different reservoir. This way each mix-tub is doing it's own thing, but still sharing the primary nutrient supply.

I see that there is only so much I can do about standing water in the bottom of the tub if my fittings are 1/8" high. I will do whatever I can to eliminate this issue. (FYI, I work in the plastics industry. I design and mfg things like cell phones, buttons & connectors. So when I say I'll do "whatever" I can do . . . I have the resources available to do far more than most!) So, what if there is a tiny puddle on one end of the tub? TINY! I know it's bad, but every tub will have some issues?

Thanks for the help everyone.