Fish tank filters are available in all kinds and in any shape you need. The purpose of aquarium filtration is to provide high water quality for your fish and keep the water clear and free of any debris. Due to the actuality of different styles and schemes, it has become a bit perplexing to decide on which filter suits your tank. But the exciting part is that once you choose a screen that is suitable for your environment, this will ensure you have a nice looking, low upkeep, hygienic and vigorous environment for your fish. Before you go out and buy your fish tank filter you need to do your research and make the right choice.

The main two types of filters widely found in our markets are the internal and external filters. The internal filters are installed beneath the substrate of your tank.  Although these filters are visible when located inside the tank, they allow you to place the container up against a wall. They are also cheap and quite easy to maintain. The primary challenge with this filters is always that they only execute best on tanks smaller than 20 gallons and have smaller filter volume. Examples of these filters include:

  1. The under gravel filter

 These are positioned right under the stratum of the aquarium’s gravel. A pump draws water down through the gravel to be able to come up with approving conditions for a successful biological filtration. The gravel filters and eliminates a lot of debris from the fish tank water. These filters are always easy to sustain, but with time they can fill up. They are not usually endorsed for planted aquariums as they can harm the roots of plants.

  • Sump filters

 These filters are made up of an interior tube that confiscates water from the tank and down into a sump area. The water is then pressed through a series of filters that helps to remove any debris and disgusting bacteria. The water is then propelled back into the top of the tank providing a constant cycle of newly sieved water back into the tank.

  • Sponge filters

They are purely a sponge that fits over the water intake. These are for breeding tanks where small fry could get sucked into the water intake and are not suitable for anything but the minimum home aquarium.

The external filter performs all the vacuuming and filtering outdoor of the tank and keeps the unfiltered water separate from clean water. These filters are always suitable especially for small fish tanks as they need regular cleaning and also can maintain the tanks aesthetic value. They pump water in and out of the container providing a fresh source of constant clean water. These are the best types of filters on the market but are also the costliest. They include:

  • Canister filters

They sit outside the tank, either behind or underneath it. They are more powerful filters suited to medium to large tanks. These filters force the water through the filter media rather than letting it flow through as other cleaners do. Consequently, they are suitable for containers that require a high level of filtration.

  • Power filters

They have become the most popular type of filter. They are easy to install and hang off the back or side of the aquarium, making the filter media easier to change than the canister filter. These are best suited to small to medium sized tanks.


The choice of the tank filter you wish to buy depends on the type of breed you want to keep. For small fish tanks then the external could best suit, and for the larger tanks, the internal could work best.

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