In testing they produce a slightly larger air bubble than air stones which translates into less oxygen transfer into the water, so for fish holding tanks, raceways, fish production ponds, etc. We recommend staying with the air stones. Barbed inlets have multiple size barbs, simply cut to fit the size tubing you are using. An excellent choice for pond and water garden aeration since they actually produce more circulation and water movement. The item "Set of 2 Rubber Membrane Air Diffuser 6 1/2MPT Inlet RAD650" is in sale since Monday, May 4, 2015.
This item is in the category "Home & Garden\Yard, Garden & Outdoor Living\Ponds & Water Features\Outdoor Fountains". The seller is "graystone-creations" and is located in Cleveland, Georgia.This item can be shipped to United States.