FEDOUR 4W/5W/8W Aquarium Corded Electric Air Pump, 96GPH/160GPH/256GPH Dual Outlets 4 Outlets Oxygen Pump, Ultra Quiet Aquarium Bubbler for up to 300 Gallon Fish and Turtle Tank (4 Outlets-8W)

I use this for a bubbler in self watering bases.

Works great. Was very loud at first, but quieted down after several hours.

When I got the pump one port didn't work already. I did contact the seller and he offered some solutions or to return it, but I needed it right away so I went ahead and used it. Now less than 6 mos later another port isn't working anymore. I definitely wouldn't recommend this air pump.ETA....I was contacted by the seller and they said they'd send a new pump but it'd take 1-2 weeks to arrive so offered a full refund instead to buy one myself. They did issue the refund within hours of my reply that I was good with that action and I'll be buying a new one as soon as it comes in, just not sure which I'll get so unfortunately I don't know if this was just a faulty pump but I do give 5 stars for customer service.

UPDATE: So company apologized for faulty one, sent me a new one and HOLY COW this does work amazing so much quieter than the first one! If I didn't see the bubbles I wouldn't know it is on! So I have to say now that I must have gotten a dud the first time because it was never this smooth or quite. Also customer service is wonderful. Company that stands behind there stuff! Can't beat that! So I would have to say now that I would recommend this even if you get a faulty one they will set it right. Now running three filters (Two 20gal and a 10gal) and an air stone, may even be able to add two more air stones like I want with this flow.So this worked pretty good, not really quite unless on the med to low setting, to power a few (two 10 gal and one 20 gal) sponge filters for two months. Although about a week ago in the middle of the night we were awoken by an extremely loud buzz (almost mini chainsaw loud) now I have to combine all four lines just to run one filter.

So I had a different 4 port air pump for my 125 gallon and it worked well, loud, but it worked. Then I needed one for my 55 gallon and saw this. I figured I'd try it because I knew the other one you could hear 2 rooms away. This one works better and is very quiet! My filters are louder than this air pump! I actually sent my other one back and bought a second one and still can't hear them both over the filters and the tanks are in the same room about 15 feet apart. If you need a 4 port air pump, stop looking and put this one in your cart and buy it! You won't regret it.

Only two of the four outputs worked out of the box. It might serve the purpose for now but I can't recommend it if a fault that bad can get past "quality control"Since I wrote the review above I have used the pump for over a week and it performs perfectly on the two working outputs which is plenty for my current needs. On top of this the seller offered me a full refund if necessary but I am happy to keep it as is and give them a five star rating as well. It is rare to get such a high level of service in my experience!!

Quit working after four days

Becomes very noisy in a matter of weeks.