An airstone, also called an aquarium bubbler, is a piece of aquarium furniture, traditionally a piece of limewood or porous stone, whose purpose is to gradually diffuse air into the tank, eliminating the noise and large bubbles of conventional air filtration systems, and providing other benefits to the health of the …

Air stones are not necessary. What you need is surface agitation. Even a slight ripple across the surface of the water will be enough movement for gas exchange. An air stone will only affect CO2 levels of you are injecting CO2.

By some reports, airstones begin to lose their effectiveness after about six weeks of use, though this varies depending on the mineral content of your water.

Depends on the fish and what you’re worried about. Dissolved O2 maxes out at around 12ppm, so not really possible to have too much dissolved O2. If it’s turbulence you’re worried about, it depends on your fish but most will do just fine with the little bit of turbulence caused by airstones.

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Aquarium Air Pump Uses. An aquarium air pump is used to introduce oxygen into your aquarium water. This not only benefits your tropical fish, but also the beneficial bacteria that are needed to fulfill the biological filtration in your aquarium tank. Many believe that you do not need to have a fish tank air pump in your tropical fish tank setup.

Aeration in an aquarium is the process of adding oxygen to a tank.

Cylindrical aquarium stones are one of the most popular types of fresh water aquarium air stones. They have a column-like shape and they come in a variety of different sizes. These air stones are frequently used in conjunction with a below gravel aquarium filter but they also work well as a simple source of oxygenation.