The MegaGarden is a terrific package that gives ebb & flow versatility in a beautiful, self-contained system. Its square reservoir fits perfectly under any garden light system. The fifteen individual planters included with the system hold grow rocks (also included) for each plant, and the large 7.5 gallon reservoir features a handy drain/nutrient level gauge on the side for an at-a-glance check of the solution level. A powerful yet quiet pump sits on the reservoir bottom for a clean appearance.