Recirculating Under Current Deep Water Culture Hydroponic System Flexoponics Quad Easy To Use ~ Quick To Set Up! Under Current Deep Water Culture System with 4 large plant containers, 1 epicenter. Comes with, Water & Air Pump. Net Pots Air Stones, Per Drilled Containers, hoses and fittings to get set up in nder an hour! Safe GFI equipped 500+ GPH water pump with replaceable filter providing abundant nutrient circulation. Highly effective and efficient nutrient solution delivery system produces Big Healthy Plants! Dont waist your time and money on those bubbler bucket systems. The Flexoponic Quad is an advanced RDWC system that will give you amazing results.