AquaBuckets 3.5 Gallon 4 Site Deep Water Culture Hydroponic System with Mixing Cell and 200 Mesh Filter Based on the same principles as professional hydroponic greenhouses, Deep Water Culture technology produces astounding yields of heirloom quality vegetables by circulating an oxygen-rich nutrient solution to the planters 24 hr a day. AquaBuckets is constructed of the finest quality materials: food-grade reservoirs and planters. Compatible with 400, 600 and 1000 watt grow spaces. Adjust plant spacing at anytime. AquaBuckets is a Recirculating Direct Water Culture (RDWC) System that uses a reservoir to provide water for multiple buckets. 200 mesh filter attaches inside the Constant recirculating oxygenates the water and ensures a good mix of nutrients CF and stabilizes PH throughout the entire system so testing is required only at one point.