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There are many newcomers to the aquarium business, and an issue they will have is the following question: Does the aquarium filter oxygenate? If I use aquarium filters, do I still need the air equipment?

In reality, most think filters oxygenate by themselves. Filters do not produce oxygen; from a scientific point of view, filters don't produce oxygen, but the circulating flow does increase the amount of dissolved oxygen in your aquarium by aerating the water.

Whether you use a pump aquarium filter, a water aquarium filter, or a submersible aquarium filter, knowledge is power on whether filters provide oxygen and what their oxygenating effects may be.

In this article, we will cover just how aquarium filters impact aquarium oxygen and the effects of filters on aquarium oxygen.

Where Does the Oxygen in an Aquarium Come From

Fish and other aquatic organisms rely on dissolved oxygen (DO) in the water to breathe.

The sources for the aquarium's oxygen include:

Note that filter sponges, media, cartridges, etc., do not produce oxygen; rather, it enters the water via water movement from water flow.

How Do Aquarium Filters Help Oxygenate the Water

Though filters don't make oxygen directly, good aquarium water filters can increase the dissolved oxygen in the aquarium.

The mechanism is:

Increased Surface Disturbance Enhances Gas Exchange

When the water flows from the filter outlet, it continually disturbs the water's surface tension.

By disturbing the surface tension, the following happens:

• Increases the contact surface between the air and water
• Facilitates the escape of CO2 from the water
• Enhances the absorption of oxygen into the water

In fact, a lot of aquariums get their oxygen replenishment from this process alone.

Circulates Water Around the Aquarium

If the water does not move (stagnates), it will eventually result in regions that do not receive oxygen.

Once the water has been constantly moved around by the filter:

• Oxygenated water from the surface can be circulated around to the bottom of the aquarium
• De-oxygenated water from the bottom of the aquarium is moved up to the surface of the aquarium
• The whole aquarium can be uniformly oxygenated.

Hence, even without bubbles, the aquarium can get enough oxygen.

Maintaining Nitrifying Bacteria Activity

The nitrifying bacteria, within the filtration system, are obligate aerobes. The organisms are capable of utilizing massive quantities of oxygen in the processes of:

• Break down of Ammonia( NH 3 )
• Conversion of Nitrite(NO 2 )
• Formation of Nitrate(NO 3 )

 Aquarium pump filter systems that achieve efficiency are those that clean and provide an oxygen-rich, static environment in which the organism can thrive.

Comparison of Oxygenation Capabilities Among Different Filters

There are many types of filters on the market, and their oxygenation effects vary significantly.

In terms of aeration efficiency, filters that create a noticeable water surface drop or bubbles generally perform better.

What Is the Difference Between a Filter and an Air Pump

A lot of aquarists mistake a filter for an air pump. Their purposes are totally different from each other:

Best when used together.

When Is a Filter Alone Sufficient

An aquarium doesn't need a pump to oxygenate the water for a variety of situations:

In most of the following instances, a high-quality aquarium water filter will suffice for oxygenation.

For example, a sixty-liter planted aquarium housing several tropical fish may have its oxygen needs met by a single, high-quality waterfall filter.

How to Improve the Filter's Oxygenation Efficiency

As well as adding equipment, you can also increase oxygen levels through your existing filtration system.

Often, with the type of filter placed within an aquarium, all that is needed is to move the angle of the outlet pipe to increase oxygen levels.

Does a Higher Filter Flow Rate Mean More Oxygen

Actually no.

Most people have a miscalculation, thinking a higher flow rate pump = a bigger and more oxygenating filter.

But the things that influence oxygenation level are:

• surface movement
• water flow patterns
• aquarium design
• water volume

And not the flow rate as the primary factor.

For example:

A canister filter with 1000 L/h could oxygenate worse than a 500 L/h waterfall filter if the outflow of the filter is submerged underwater.

So, the best idea when choosing your submersible filter for aquariums is that you will need to evaluate filter capacity and flow pattern. You should consider these two characteristics, not only the specification of the filter's flow rate.

Can Aquarium Filters Provide Oxygen

The answer is:

They can help provide oxygen, but they cannot directly produce oxygen.

The most important function of all these, be it aquarium water filters, aquarium pump filters, or underwater aquarium filters, is water circulation and filtration, while the increase in oxygen is a by-product.

Even the well-designed filter system of a home aquarium is adequate for most basic needs and thus takes care of basic oxygen level needs. Nevertheless, in conditions like high fish stocking levels, summer heat, or the aquarium being large, saltwater, using an air pump along with other aeration accessories seems to be the best choice.

To see your fish grow healthily, you'll have to select a good filter system, keep a regular flow of water, and maintain the system periodically.