"HYDROPONICS HOOLIGAN" - Hydroponics/Aquaponics / Koi Pond Aerator - Ultra Fine Bubble Air Diffuser Manifold System; model# HSAL-16; Self-Weighted by Bubblemac "Awesome" Ultra Fine Bubble Manifold System designed specifically for Hydroponics / Aquaponics Applications. Consistently produces "Ultra-Fine Bubbles" {0.5-2 MM} -- Bubblemac Aeration Products Provide An Effective, Yet "UNIQUE" Alternative To The Import Blue Air Stones.... These diffusers WILL NOT fall apart and fail in a short period of time. Bubblemac Manifold System {model# HSAL-16}, consists of two 1.5" x 1.5" x 6", 100% Glass-Bonded Silica Fine Pore Air Diffusers, the Highest-Quality Air Diffuser on the Market Today! The ultra fine pore manifold system produces a cloud of micro-bubbles. Smaller bubbles provide more surface area, creating a more Efficient Oxygen Transfer Rate. Comes complete with Assembly / Care & Maintenance Guidelines and an assortment of three standard air line connection fittings {3/16", 1/4", 3/8"} This manifold system is compatable with low cost air pumps. {Suggested CFM = 1.0 or 26-30 lpm} Bubblemac Aeration Products Manifold System is unlike the High-Density Molded Plastic Import Systems that are maufactured for pennies and sold to the consumer for high-dollar pricing. This unit will Outperform and Outlast the others Hands-Down. Made in the USA and warranteed against defects for one year. SPECS: 100% Glass-Bonded Silica, Maximum Pore Size 80 Microns, Nominal Partical Retention 25 Microns, Flexural Strength 3500 PSI, UNLIMITED LIFETIME in pH 8.0 or Less.