Hydroponic system Complete DWC BUBBLER Kit, 3-6 by H2OtoGro Complete growing kit, even includes starter packs of nutrients & grow mediums to get you started! Just add sunshine. Grow herbs, flowers, fruits and vegetables anywhereindoors, outdoors, counter top, office, tight spaces, etc. Oxygenation ~ 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. Made with 100% Food Grade Polyethylene! 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.