Aquarium Air Pump Mini USB Fish Tank Oxygen Air Pump Portable Ultra Silent Air Aerator Pump Energy Saving Oxygen Bubbler with Air Stone and Single Outlet Silicone Tube 1W

I use one of these mini usb one for emergency power outage and they're pretty quiet. quieter then all other air pump I have in the past https://www.amazon.com/dp/B093GPS7JF?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_2&th=1