The mechanism involved in aquarium air pumps has been elucidated underneath,
There are two reasons people use air pumps. The first is that they are using an air-driven filter. Inside box filters and sponge filters use air to move water through the filter. The second is that people like bubbles. In fact, for some aquarists, a tank isn’t right unless there is at least one stream of bubbles rising in it. A side effect of both of these uses is that the current created by bubbles rising in an aquarium contributes to the aeration of the water. You certainly don’t need an air pump, since despite the name “aeration,” air bubbles are not necessary or even basic to gas exchange, but you certainly can use air for aeration.
A battery-powered aquarium air pump is handy to have when you need to transport your aquarium or unhook the pump from power for any reason. Much more importantly, a pump that runs on batteries ensures that your aquarium gets oxygen even during power outages. Better pumps offer "uninterrupted power" and include rechargeable batteries that remain plugged in and can automatically switch to battery mode in the event of a power outage. Less expensive models may be just what you need for
Air Pumps: Aquarium Airpumps and Accessories
Heavy Duty Aquarium Air Pumps - Doctors Foster and Smith
OK, this one's relatively simple. An air pump is a device used tomove air, possibly under pressure. Typical aquarium air pumps move airby using an electromagnet to rapidly vibrate a rubberdiaphragm. Unfortunately, this has the side effect of creating as well as moving air.Air Pump Aquarium
Consider having a conversation about flow at Everything Aquatic forum:
For additional information about why to use sponge filtration please see our Sponge Filtration Article ("Sponge Filtration Information")
For pump Specifications to help match a pump to your needs:
For high quality sponge filters please see;
For a good power head please see
For air pumps please see
Additional video for Power Head Compressions. Flow Demo There are no really quiet . Aquarium air pumps move air by causing rapid vibrations ina rubber diaphragm. Though this does move air fairly well, thevibration also produces noise. However, there are several things youcan do to make your air pump quieter:An is one of the most basic, yet versatile, pieces of equipment that you can own for your aquarium. The Basic function of an Aquarium Air Pump is to force air, through mechanical means, from the atmosphere into your aquarium. By forcing air into the water, you create water motion with the rising air bubbles, and also provide oxygen to the water that your aquarium fish and animals need to "breathe". With the use of an you can greatly improve the efficiency of air transferred into the aquarium, and also enhance the appearance of your aquarium. There are many types of Air Stones available, with interesting forms and functions. Air pumps can also be used to efficiently operate some types of aquarium filtration equipment.