NICREW Nano Silent Mini Aquarium Air Pump, <33 dB, for Tanks up to 40 L | Piezo Ceramic Technology, Ultra Quiet Operation, 18 L/h Air Output, 1.5 W Energy Efficient, Compact Design

Amazing, super quite the only noise is the bubbles it makes, great quality I have two and have worked a charm in my tanks!

Completely silent air pump that about as small as you could need, its not the strongest Airflow but works in my 125l airstone, would love to see this pump in other models for larger tanks and higher Airflow too, the design an silence would make it a massive upgrade to my 5 tanks. I dont mind the noise or bubbles just not droning pumps which product solves! There is no adjustment or dials but it just a plug and play experience. Due to the calmer nature of this pump it make a nice stable stream of bubbles rather than the choas some pump cause! Would definitely buy again for my other smaller tanks though im not sure it would work for anything above 120l ish.

Quite an impressive little pump and very quiet. works fine in my nano shrimp tank. Dropped a star as the airflow isn't as high as the description would have you believe and similar, albeit noisier, comparable pumps using different technology so would be cautious if you need it for anything other than smaller low flow applications. For me in the nano tank I always used to bleed away excess air so this is ideal with the reduced flow. Be interesting to see how durable it is seeing how some of the Tetra pumps have lasted forever, but this is definitely quieter than those and also seems to be easier to totally eliminate all noise if you further soundproof it something I never managed with the Tetra's

This is a great little device. It sticks to the glass on the outside of the fish tank and blows air through a tube into the water brick. Works well and makes very little noise. The best one I have bought. Would recommend to anyone with a small tank. The only downside is the length of the power cable. It is short, so may need an extension lead if it has to go a long way to the power. It was a good price and I would buy again when this eventually stops working.

Never put a review when I buy something but this one really amaze me. It is really quiet no sounds or vibration. All you can hear is the bubbles coming out.

Great little air pump. So quiet and sits neatly on the side of my tank. Will buy again.

After keeping tropicals previously, I decided to install a new aquarium, and one of the biggest problems has always been the noise from the air flow pump. Not only are they usually quite large, they also tend to hum away like a tractor driving you mad and defeating the object of peaceful fish keeping. Not with this one. Super happy with this purchase, it's small and mighty! Easy to set up just plug and go. When I first plugged it in, I thought "uh oh faulty" as there's literally zero sound or vibration from the unit itself. It's only when the air stone is submerged that you see it kick in! Perfect strong air flow, masses of bubbles, fish lively and loving the new addition. I'd say it rivals, if not beats the more expensive on the market. It's supplied with plenty of tubing so you can hide the air stone behind live plants and decor, and the slimline unit itself is tiny and sits perfectly with the suction cup to the outside of the aquarium allowing for cables to be kept tidy and hidden. In use, the only sound is the strong but gentle flow of bubbles which is both relaxing but most importantly not disruptive as the aquarium is in the bedroom. 100% worth the price and would buy again without hesitation!

Not silent at all. Followed the instructions to a T, had it running for all of a few hours before I had to turn it off. (see video - all that noise is from the air pump). Now put it on a plug with a timer so it only runs at night. Would ideally return this one but had to cut the tubing to work with my tank & don’t want it to go to waste. Rather invest in one with an adjustable flow valve or another brand that’s quieter.