It is common knowledge that aquariums, especially the bigger ones, need a water pump to keep the circulation of the water fresh at all times. After all, stagnant water can cause a lot of stress to fish. It also doesn't circulate dissolved chemicals (e.g. medicine, supplements, vitamins, etc). At the same time, stagnant water is nothing like water in rivers and oceans. The non-movement will surely be something your pet fish are not accustomed to.
So now we've established that aquariums do need water pumps in general. But do you also know that they need air pumps, as well? An air pump specifically circulates air around the tank. It makes oxygen readily available for all fish, while it makes carbon dioxide reach all plants. When there is a lack of air, the air pump produces it.
A good air pump is the JW Pet Company Fusion Air Pump 700 Pet Store. This small device releases pressurized air which can absorb sound. Thus, this air pump works quietly in the background. It also has a control knob which you can set to get the precise flow you want.
The JW Pet Company Fusion Air Pump 700 produces a powerful and constant output, so you can be sure that it is reliable.
The Fusion Air Pump 700 has a patented Baffle system, which is a series of chambers that are interlinked by small openings. These chambers not only absorb the sound, making the Fusion Air Pumps amazingly quiet, they also create pressure as the air is pushed through each small opening, producing a powerful air flow! Also features an air control knob, which gives the user optimal and precise air flow control!