Just got my pondmaster ap-40 air pump and man is it quiet and puts out some serious air. I run a 6 bucket DWC that I had a mid grade air pump ($50 bucks of ebay, you can see the old one in teh pics) but it was really loud and the air pressure sucked when I had (4) 4" and (2) 5" round stones. Now that I have hooked up the ap-40 the a pressure is great and I even added (3) 4" stones for the res and I have plugged 5 ports of the 12. This pump is whisper quite, my total noise dropped 50% from my old air pump and my noise issue now is just fans, but that is easy to hide. I plan on getting (4) 5" round air stone to replace the 4" round ones I have in buckets. This pump is great, it is quiet and pumps some serious air, but it is big!

Big thanks for the heads up Opie, ths pump rocks!

Here is the before the pump
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Here is after
[attachment=o171801]

The ap-40
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fosomker Reviewed by fosomker on . Best Air Pump (AP-40) Thanks Opie Just got my pondmaster ap-40 air pump and man is it quiet and puts out some serious air. I run a 6 bucket DWC that I had a mid grade air pump ($50 bucks of ebay, you can see the old one in teh pics) but it was really loud and the air pressure sucked when I had (4) 4" and (2) 5" round stones. Now that I have hooked up the ap-40 the a pressure is great and I even added (3) 4" stones for the res and I have plugged 5 ports of the 12. This pump is whisper quite, my total noise dropped 50% from my Rating: 5