DWC Hydroponic BUBBLER System #4, 6 site by H2OtoGro OUT OF STOCK? Our Amazon item # B00UIPMFBY ships within 24 hours! Complete growing kit. Perfect for school projects or science experiment! Grow herbs, flowers, fruits and vegetables anywhereindoors, outdoors, counter top, office, tight spaces, etc. All H2OtoGro products are made with 100% Food Grade materials and feature a garden hose adapter (an H2OtoGro exclusive) and starter supplies of grow medium and nutrients to get you started! 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. Water level indicator ~ Helps maintain the proper water level in the reservoir without lifting or removing the lid. The black out style reservoir and lid along with the blue color of the water level indicator help inhibit algae growth inside the reservoir.