In present day many pet enthusiasts are keeping fish as their pet that can fit in small spaces in the house. An aquarium is a closed environment for both fish and aquarium waste. If you don’t eliminate those waste, you are creating an unfavorable environment for fish and eventually killing them. So, one of the most important parts of fishkeeping is aquarium filter(aquarium filtration methods).

Today’s aquarium filtration methods offer a wide variety of filters to keep your tank’s water clean and healthy. While choosing your aquarium, your decision must be based on the size of the tank, type of fish and number of fish. The turnover rate of the filter should be at least 3 times the volume of aquarium per hour. For example, if your aquarium is 20 gallon then you must get a filter that has at least 60-gallons per hour.

All aquariums require both mechanical and biological aquarium filtration methods to maintain a healthy environment for your fish. Having the right filtration system will determine how much time you need to devote to the tank to clean your tank and it does make a big difference in what kind of filtration system you use.

Most of today’s filter works mechanically, trapping solid wastes in its filter media which can later be removed manually. Whereas a biological filtration is for building beneficial bacteria in your filter media that breaks down ammonia and nitrite that are toxic “nitrogen cycle“. Any filter you use must be mature enough to work properly, you cannot expect a filter to clear pollution in your tank right away, and it takes time to start working. To achieve the absolute best water condition, you may need to use more than one type of filter. There is various type of filter on the market today.

Let’s have a look at some of the best aquarium filtration methods for your freshwater tank:

Undergravel filter
aquarium filtration methods | Gravel Filter

As the name suggests, this filter finds its place underneath a layer of gravel. In this type of filter, water moves through the gravel to create a biological filter. Once beneficial bacteria colonize in the gravel, then they effectively break down the waste material. Undergravel filters are relatively the cheapest form of biological filter. These filters are suitable for small aquarium or aquariums with a light fish load.

Internal Power Filters
aquarium filtration methods | internal power filter

Power filters are the most common filter. This filter is fully submerged in water. These filters provide great power and versatility, provides excellent filtration and water movement. If you are buying an internal filter, buy the one with lots of filter media inside. These are more effective and efficient to clear the water.

Sponge Filters
aquarium filtration methods | Sponge Filter

A sponge filter is fit over a tube from an internal powerhead or an air pipe. The pump forces the water through the sponge and beneficial bacterias grow on the sponge thus creating a biological filtration.
This filter is suitable for tanks housing young juveniles and fry because the sponge prevents the pump from sucking the fry.

Hang On Back Filters
aquarium filtration methods | Hang On Back Filter

A Power filter is without a doubt the most common aquarium filter. A standard power filter hangs on the back of the fish tank, these filters are easy to maintain. Easy to install, and provides both mechanical and biological filtration and also chemical filtration.

Canister Filters
aquarium filtration methods | Canister Filter

One of the types of external filter is Canister Filter. A Canister Filter is a common accessory in large aquariums or tanks which house a lot of fish. This filter usually finds its place beneath the aquarium. Each canister will have a different location to hold each different types of media, the larger canister will have more filter media.

Sump Filter
aquarium filtration methods | Sump Filter

A sump filter is nothing but an aquarium with all the filtration media, water pump, and heater. Sump filter is customizable, you can build it according to your choice. Generally, we place sump filter beneath the aquarium. Traditionally, sump filters were used in marine tanks where good water quality is essential. Nowadays as freshwater tanks are getting bigger and people start keeping larger fish, sump filters are getting popular because of its superb effective and efficient filtration they offer. If you are interested in sump system please read the following article: “Sump Filter