The Jiyin Air Stone is a type of DC powered air pump with an actual USB connection. For years I’ve searched for a pump like this for several years now and while I’ve found some that have a built-in battery, and some come with a USB adapter, the Jiyin Air Stone is the first with an actual micro-USB connector.
The Air pumps that we use are mostly of the AC variety, be they a typical air pump or the piezoelectric versions from Aqualighter. But the pumps we count on for emergencies that can be powered by batteries are actually using direct current.
We won’t be powering any particularly huge skimmers or large tanks, but for small tanks or during power interruptions, having a USB powered air pump means you can keep constant power via any number of high capacity battery banks. I for one am very keen to see how well the Jiyin Air Stone performs on my home-made bottle skimmers and with a meager price of around ten bucks, it’s definitely worth a shot.