Multi Flow Hydroponics System Gravity Ebb and Flow Bucket Controller Brain Unit Fully Digital Controller - 24 Hour timer w/ 17 Programable different fill and drain times 7 Gallon Controller Bucket with 10 Outlet ports Active Water Culture Capable - Built in Air Fill Power Option Adjustable Ladder level control lets you fill containers to the desired height Bottom draw pump (258GPH rating) to minimize water residing inside controller unit or buckets