Like Stinky said make the tray and res light proof...I'd also make a lid so the pots sit in the lid and the roots can dangle freely, also making it completly light proof in the flood table... I've got some experience with ebb n flo and have found that the plants seem to like it better in the lid than just sitting in the tray... Good luck ...let's see some pix of it filled up and in action...