BubbleMac Aeration Products Aquarium Bubble Stones/Air Diffusers/Air Stones/Bait Bucket Aerator - Twin Pack Made to Last

These air diffusers are produced by Bubblemac Industries, Inc. the producers of over 3.5 million units marketed to fish farms and hatcheries worldwide. Now available to the consumer in an aquarium application. Made in the U.S.A. One Year Warranty. Tried the cheap blue imports? Now try a high-quality air diffuser.....Time tested in fish farms, college labs and public aquariums worldwide.