great advice, thanks.
this ? was probably not worded well. how tall to make racks for the tubing? 3" or 4" tubing preferred?
it's really 2 questions. Is 3" or 4" pvc tubing the best choice for the
ebb and flow growing tubes?
the other part is how high to make the shelves to put these on, as to not bend over all the time to work the plants. I had envisioned a 36" support structure for the ebb/flow tubes running on one side and putting the drips on the other side closer to the ground for the bigger plants, since they will need the room to grow vertically. Would the twin 55gal be enough or should I go bigger on one or both. I have a backhoe and can sink whatever is necessary. POssibly even a concrete greasetrap 200gal if needed. I just need to do it right the first time.