Flo-n-Gro 12-Site Ebb & Flow System This Flo-n-Gro system comes complete with a 55 gallon food grade reservoir, twelve (12) 4 gallon grow sites and twelve (12) 3 gallon 360 degree mesh aeration inserts These mesh inserts promote lateral root growth and better aeration for the root zone The complete system features Titan Controls Oceanus 1 - Flo-n-Gro controller