Review on Danner 04540 Air Pump: Enhance Your Aquarium's Oxygen Levels with 2900 Cubic-Inches Minimum Air Volume by Pamela Ervin

My 2600 gallon carp pond does very well with it. I have 4 large cylindrical shaped pneumatic rocks that I purchased from this site that are attached to frost lines. Yes it does make some noise but not as much as I've read in other reviews. This is a pretty strong pump by design and feel so I expect it to last a while. Bought to save a hole in the ice after my Aquascape 4 outlet air pump half died (2 outlets stopped working because something broke in the pump). ). I sealed everything except 4 diffuser holes (lots and lots of layers of tape. Ugly, but it works). I had air rocks at the bottom of the pond, but it was so cold I had to lift one about 6 inches below the water's surface to keep the hole open.