Review on 💨 Danner Manufacturing, Inc. Pondmaster AP-20 Air Pump - 1700 cu in/min by Christopher Jones

I bought these to replace an air pump from a European company because the replacement diaphragms cost almost the same as this pump. I'm glad I bought the AP-20, it's used for a 1700 gallon open pond, it's very quiet, I can barely hear it at 5 feet. I could hear my old air pump 50 feet away. I don't have it covered at the moment and it has endured several heavy rains with no problems. Reviews for Danner products are mixed, but they have worked well for me. My first 1800 gallon Danner mag-drive pump lasted at least 10 years so I bought another one that is in its third year and is still working. That's why I decided to stay with Danner.