Air Diffuser/Air Stone: Aquarium, Pond, Water Gardens, Aquaponics Micro-Bubbler,HYDROPONIC HOSS -{Model# HD0061F}- Manufactured by Bubblemac Industries, Inc. Makers of The Forever Bubble Stone -- This awesome micro-bubbler was originally designed specifically for Hydroponics applications, but has become very popular with large aquarium enthusiasts as well. Diffuser creates a uniform bubble 0.5-2 MM in size. **{Suggested 0.5 CFM or 14 lpm}** The "Hydroponic Hoss" emits a cloud of "crisp" ultra-fine bubbles which increase the surface area for oxygen absorbtion into the water, resulting in the "Highest Oxygen Transfer Efficiency" of any diffuser design currently on the market. Model# HD0061F is a high-quality 100% Glass-Bonded Silica Fine Pore Air Diffuser. Measures 1.5" x 1.5" x 6" with a 3/16" OD poly barb {standard air line connection}. Diffuser Specs: 100% Glass-Bonded Silica, Maximum Pore Size 80 Microns, Nominal Partical Retention 25 Microns, Flexural Strength 3500 PSI, Bubble Size 0.5-2 MM, UNLIMITED SERVICE LIFE when used in pH of 8.0 or less. MADE IN THE USA. Two-Year Warranty. This Bubblemac design "replaces" the DEEP WATER INNOVATIONS model# DWMPD050. Their import diffuser just can't compare to the Bubblemac design.