Aquarium Air Pump - AquaMiracle Fish Tank Bubbler Aerator, All-in-One Fish Tank Air Pump, Quiet Aquarium Bubbler Aerator for 1-80 Gallon Aquariums

So I chose this one both because I am on a budget but also because I have a 10 gallon for a betta, who do not like high flow, so I only wanted a small air stone with a low flow rate. Well! This little air pump says it can be used for "1-20 gallons" and yeah it's probably more appropriate for a 20 gallon if you don't stick a flow valve on there to taper it a bit, unless you have really high flow fish in a small tank. Without an additional air valve I added on later, the output was so high that it not only would have been too strong for a betta in 10 gallons, but it was leaving huge amounts of condensation on the tank lid, so I couldn't imagine using it in a 1 gallon setup for anything. Once I added the additional flow valve, it's perfect on the absolute lowest setting I could make it.The noise wasn't terrible right out the gate, but it seemed to get noisier after a few weeks so I ended up attaching a key ring to it (there's a hole on one end) and hanging it so it would quit vibrating on things so much, and that has helped.So ...pretty powerful, works well, but needed a couple of modifications. If it had been adjustable by itself or come with a flow valve in the package, that would have been awesome, but as it didn't I gave it 4 stars.

Works great and is mostly quiet. Sometimes it’ll vibrate into other objects and I’ll just have to move it back to a quieter spot. Easy fix.

Works great. I only wish that it came with suction cups to keep the air stones at the bottom of the tank as the air stones float

Kinda of noisy.

Bought this for my grandson who just started his aquarium.

The media could not be loaded.  Almost ti much power so I chocked it off a little we will see over time if the motor will burn

This pump Is so noisy!!! Especially once turned off when cleaning the tank. Wish it was alot quieter. It gives a great output of air but so darn noisy!!! 5 stars if it was quiet.

The media could not be loaded.  Air stone seal defective out the box.Customer service has quickly promised to send me a new device. Will update review to reflect the functionality of the second unit.Second unit came, works just as advertised. Thank you for your customer service.

Received mine without the air stone? Weird. The suction on this pump isn’t amazing, and it’s quite noisy if you’ve got it on a hard surface - however, it gets the job done. I’d recommend it for a tank under 10 gallons. All in all, for the price it’s okay.

Plugged this thing in and it would not power the 2 air stones provided. Returned it and ordered a better product

Does what it says (2-10 gal tanks).Comes with airstone, backflow preventer, tubing, and two extra air filters.So far it is working great.

I use this pump for a three gallon deep water culture bucket system it works great

very good pump for my fish tank, hopefully will provide better environment for fishes