Product Details Get the convenience of an Ebb & Flow System in a 22" x 22" x 10" size garden. Ebb & flow (flood & drain) systems work by pumping nutrient solution up from a reservoir to a controlled water level tray. All plants are watered uniformly on a timed cycle. Features 7.5 gallon reservoir Insert grow tray Submersible pump + timer Seed starter cubes Water level indicator Growing medium + 15 5.5" square planters pH test kit Illustrated instructions