About This Anti-Clog Design – Unique materials and self-cleaning perforations maximize output and ensure consistent bubbles for years of trouble free oxygenation. Cleans Stagnant Pond Water – Dramatically reduces scum by using the rising air to ensure constant water circulation leaving your ponds surface clear and clean. Integrated Check Valve – Protects your pump and the aeration tubes / diffusers from potential damage. Built-in Bobber Anchor Point – For attaching a retrieval bobber that allows vertical retrieval from ponds with highly vegetated or complicated floors. 25% Increase in Ballast Weight – Self-weighted base is designed to remain submerged in the water and ensures up-right position sitting on the floor when submerged. No Assembly Required – Out of the box ready to use, attach to your air pump using your 3/8-inch sinking hose (the pump and sinking hose not included). Deices & Oxygenates – Made of resilient materials allowing year round operation to eliminate fish kill, prevent full pond surface freezing and reducing ice buildup. Overview Brand : Rootscape Material : Plastic Color : Original White Air Diffuser Item Weight : 2.3 Pounds Nominal Wall Thickness : 0.0625 inches UPC : 689353600787 Manufacturer : Rootscape Marketing LLC