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

It pumped out enough air for 55 gallons, 3 x 10 gallons, 2 x 20 gallons and I still leave 2 ports open on my manifold so I don't blow out the fish. I have 10 large tilapia foam filters and a large air stone. Has been working flawlessly for 3 months. It's quiet here, maybe not quiet enough for a bedroom or where you watch TV, but in our finished basement next to a new running air conditioner it's barely noticeable. I would say it's definitely quieter than the air conditioning in a hotel room. Would I buy again if I needed more air.