Run four recirculating deep water culture stations on one loop with a 4-bucket 5 gal. RDWC hydroponic grow system that adds top-drip irrigation, a shared nutrient reservoir, and continuous air-stone aeration to the simple DWC setup home growers start on. Each polypropylene (PP) bucket holds 5.28 gal. (20 L), and the 11.81 x 11.81 x 14.96 in. (300 x 300 x 380 mm) bucket size fits a grow-tent footprint or sunroom corner without floor redesign. The top-drip manifold plus RDWC flow keeps oxygenated nutrient solution circulating across roots, promoting root development and balancing PH and EC across all four stations, a faster-development spec over single-bucket static DWC that oxygen-starves on warm afternoons. A built-in air pump feeds air stones through tubing to each bucket, submerging roots in nutrient-rich, high-oxygen water for healthier leafy-vegetable growth year-round. A 7.87 in. plant-basket opening fits common net pots; sealing rings between bucket and lid prevent nutrient leaks, and a check valve prevents back-siphon when the pump cycles off. Pre-cut water level tubes of uniform length eliminate the leaks amateur-cut kits produce, with high-quality valves for better sealing. PP buckets resist corrosion, deformation, and temperature swing, handling grow tents, sunroom balconies, and heated greenhouse setups. Kit 22.04 lbs. (10 kg) total. Fit for lettuce, basil, spinach, kale, leafy vegetables, herbs, strawberry, and small-fruit hydroponics. Color: Black.