Review on 🐠 Penn-Plax Silent-Air Aquarium Air Pump - Efficiently Oxygenate Your 20 Gal Tank! by Christine Castrillon

I bought this pump in 2012. It's finally on its last legs (a tear near the diaphragm) but has worked VERY well with constant use. I've tried replacing it with the Terta Whisper series (40's and 60's, lots of BAD reviews here) and after SEVERAL returns and re-tries, NONE has been as quiet as this Penn Plex. I agree with some of the other reviewers it's just good quality and neither pump is totally silent. I found that sometimes I just had to move it and it would calm down. Another suggestion is to place it on a computer mouse pad. I ended up replacing this pump with the same one which is why I give it 5 stars!