My rez is just another bucket in the system with no plant in it. It is right on the floor. I have a loop and at each T is a bucket. All but one of the buckets has another bucket in it. For a wick I use a tailpiece, with no screen. I have used forestry tubes in the past with large holes in the bottom, bigger than the tailpiece, with no coco falling through. One bucket is empty and has a pump in it, which is hooked up to a drip system. I have not yet set up a float valve, but have one ready.