I decided to try a more powerful pump and was blown away by how quiet this one was. I took it apart and found out that there is an inner chamber completely encased in steel and suspended by rubber with lots of spacing around it. This is, in turn, surrounded by thicker outer plastic shell that sits on silicone feet/rubber feet so you get double damping.
Nice Bang for Your Buck
We provide a ready-to-go air pump kit for fish enthusiasts, including HG-949 Air pump, 3.6 ft long air tube, 0.9 inch air stone, check valve and user manual (check valve prevent back siphoning).
Strong Airflow and Low Consumption
Our 1-watt small betta air pump is very energy-saving with a max flow rate of up to 50 gallons per hour, capable of operating a small sponge filter and large air stone, creating tons of tiny bubbles, increasing water movement and circulation.
Powerful, lightweight, low noise, along with long service life. For use with air-driven aquarium accessories like air stone, ornaments and small sponge filters. Mini Aquarium Air Pump only measures 3.5 x 2 x 2 inches.