im planning on using beds, with a constant drip feed system, this said, my resevoir per table will be located directly beneath the bed, drilling holes into the bed so as to let gravity do the work of draining the bed back into the rez and using a pump to feed the main system of the drip/feed. on the bed i plan to place a plastic ribbed sheet (4x8ft can be bought at home depot) cut holes into this about 16, into which i will place black plastic baskets, which then will be filled with hydroton. pretty simple set up, my 2nd venture into hydro, any info would be appre.