USB Aquarium Air Pump, Ultra Durable & Quiet USB Nano Air Pump, Small Air Bubbler for Aquarium Fish Tank with Air Stone and Silicone Tube

This pump is genuinely silent. The only noise from it is the sound of the air coming through the stone. It's very impressive. I used it to help my aquatic pet as I moved across the country, and it let me keep her aerated using the usb plug in my car as well as the ability to use a portable charger when I needed to. It worked out great! She made it, and it was definitely largely due to this stone. Would be great for fishing as well, but I use it now as my tank's main air pump because the big one is so loud! This one is so quiet. It's amazing. 10/10 from me.

totally silent operation, powerful for its size, plug and play, no adjustability, I am using it to run 3 sponge filters in in 3x1 gallon tanks and I only hear the bubbles. I used an adjustable valve splitter 4 way to bleed off a little bit of pressure to reduce excessive flow.

UPDATE: I bought a "USB LED strip light dimmer switch" on Amazon in hopes I could use it instead of a tubing flow restrictor, and it works great! I was able to finely and easily tune the bubbling amount. The pump is now entirely silent and all I can hear is the bubbles. My USB tester says it uses only ~0.15 Watts on average, 1/10 the original amount out of the box, and it runs on maybe 1.5 Volts as opposed to the original 5 Volts. I totally recommend buying a USB dimmer switch for use with this pump to reduce noise, airflow, and power consumption if the pump is too strong for you, out of the box. The voltage adjuster I bought has a dial on it as opposed to +/- buttons, and I suspect the dial is better in that it has a more fluid/analog, mechanical, simple voltage adjusting mechanism. One of the other tiny air pumps on Amazon has a built-in voltage dial, but I like how having a separate dial can allow me to replace one part without the other. Someone should start selling these pumps as a combo with dials.Original review: This pump is so strong, I was skeptical of the 0.2 Watt claim. I think the vendor meant to say it's 0.2 Amps, not 0.2 Watts. At 5 Volts, it's actually 1 Watt (as can be seen in the photo as well). I was looking for the lowest airflow pump on Amazon because I got this for my tiny ~5 cup (~1 liter) Sea Monkey tank. My Sea Monkey tank is so small that I initially elected to use a flow restrictor on the pump tubing, and it seemed to work well with the flow restrictor.

Do not buy! This pump stopped working 10 days after the return window closed. In addition to that it was always louder than advertised. It could be heard from across the room, even when hung in the air to reduce vibration. The nicrew brand pump is the quietest I have tried so far and it lasts. Try a nicrew if you are looking to reduce noise.

Work great! Small size and produces many bubbles. I have bought two now. The on/off does not work consistently on one of them. Motor on mine stopped after several months. Nice small and portable product as description notes!

Why did you pick this product vs others?:Great little air pump. Works great. Will be buying another one. Great price and product.

Works good but make a low whine noise that I don't like

This little pump is quiet, powerful and easy to use. It’s almost perfect except that at one year it just stopped working. Just like that. I bought another one and same thing happened. I’m buying yet another one in hopes it lasts longer, but even if only for a year this pump is worth it.