Hydrofarm Active Aqua Grow Flow Ebb & Gro 12 Site 2 Gal Hydroponic Sytem| GFO7KT Comes standard with 12 pots (Expandable to 48 pots) Individual pots (modules) allow you to easily move / relocate plants Each controller can control from 6 up to 48 plant sites plenty of room for expansion A smaller reservoir (55 gallons) can be used with less water compared to flood &amp; drain tables Reservoir does not have to be lower than the plants