The Azoo Battery Air Pump is a great little device to have in case your power goes out, you need to coroutine a fish or if you have to do the most dreadful thing ever with a fish tank "MOVE". —       The pump is great but loud it runs off of 2 D battery and comes with a air stone and 12 " of air hose. They worked like a charm for me while i moved my 55 gal salt water tank, i bought 4 of them one for each fish and made a temporary habitat out of a bucket w/ lid, the air pump some hose and live rock, the fish… read full review »