DWC 4-site Hydroponic Bucket BUBBLER Grow kit Complete growing kit, even includes starter packs of nutrients & grow mediums to get you started! Just add sunshine or our grow light. Includes "FDA Approved" food grade Buckets (12"W x 15"H) with 6" net pots and all food grade materials. Oxygenation ~ Each module provides plants with highly oxygenated and nutrient enriched water that circulates below the plants for the best results and minimal effort. This oxygenation helps increase plant growth and speeds plant development. Plants can grow faster and larger in a DWC Hydroponic system compared with soil grown plants. Grow herbs, flowers, fruits and vegetables anywhere...indoors, outdoors, counter top, office, etc. Water level indicator ~ Helps maintain the proper water level in the reservoir without lifting or removing the lid. The blue color helps inhibit algae growth.