Review on 🐠 Adeeing Portable Mini USB Aquarium Fish Tank Oxygen Air Pump - Silent, Energy-Saving Supplies with Added Accessories by Jon Odom

I bought a regular pump at my local pet store and didn't want to put up with the quiet and consistent hum of the pump. I saw the recommendations for this pump and decided to give it a try. The pump is incredibly quiet, so quiet that the bubbles created by the included air stone cancel out the sound of the pump itself. The bubbles are pretty significant considering how little power the pump requires. I checked the voltage at the pump and found it was running at 5V, 0.13A. If you restrict the airflow coming out of the pump, the current would jump to 0.2A. I tested this to make sure the charger USB 5V/1A vs 5V/2.1A makes no difference. I opened the blue cover to see how it works. It appears to be a DC motor attached to a tiny special pump. They're available in China for a great price, but they don't come with an air stone, plastic cover, and USB cable, making this a pretty good deal. However, it is definitely not waterproof. I hope this pump lasts a long time as I will consider buying more tanks in the future.