External Canister Filters

External canister filters, otherwise known as external fish tank filters, are perfect for larger aquariums where an increased level of filtration is necessary. These types of filters are extremely popular because they result in a purer filtration, which means less contaminants and toxins being pumped back into the tank. External canister filters generally have room for different kinds of filter media so that the water goes through multiple stages of filtration. The aim is to provide thorough biological, mechanical, and chemical filtration. As external filters, they are also positioned on the outside of your tank, which increases the space inside of your aquarium.

Whether you’re looking for an external filter for your pond, tank, or aquarium, we’re sure to have the right product for you. We stock adjustable external canister filters which are an extremely powerful filter suitable for aquariums up to 500 litres in size.  Our external canister filters with UV steriliser also use ultraviolet light to kill bacteria and harmful microorganisms that pass through. This offers a much more efficient way of filtering your water. 

Ready for a new external canister filter for your aquarium? Browse our range of external canister filters below. When choosing your filter, make sure it can handle the volume of water in your tank. Simply check how many litres of water the filter is designed to work with. You can also enjoy free UK shipping with no minimum order quantity, as well as same-day despatch on orders placed before 4pm. If you have any questions about the different filters, please feel free to contact us for more information. 

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  1. External Filter Booster - Add-On Filter (2 Sizes)

    Our external filter boosters are designed to be used alongside an existing external canister filter to quickly and easily increase your filtration volume. These filter canisters do not have a pump, so they are connected into the water exit line on your existing canister filter and pumped through this booster unit.

    These filter boosters are available in two different sizes. The small one holds 1.2 litres, and the large one 2.3 litres. They also have different pipe diameter connections.

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    As low as £19.99
  2. Sunsun 4600l/h External Canister Filter Fish Tank Aquarium with UV + Flow Control

    The SunSun HW-5000 is one of the newest canister filters from SunSun that is easy to set up and simple to use. It offers a very high flow rate of 4600 litres per hour for just 40w of power consumption thanks to the removable DC pump with SINE wave technology which is more energy efficient than regular canister pumps.

    This model includes a detachable smart digital controller which allows users to adjust the water flow rate and UV sterilizer's "ON" time. The HW-5000 has a controllable built-in 9W UV steriliser, which is perfect for keeping algae away from your aquarium.

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  3. Sunsun 3000l/h External Canister Filter Fish Tank Aquarium with UV + Flow Control
    Rating:
    94 % of 100
    Newest canister from SunSun that is easy and simple to use. The HW-3000 features an LCD display that will surely enhance any user's experience with the canister. With an LCD display, users can adjust the flow of the pump. The HW-3000 also has a controllable built-in 9W UV steriliser, which is perfect for keeping algae away from your aquarium. Learn More
  4. 1000l/h Aquarium Fish Tank External Canister Filter with Media
    Rating:
    100 % of 100

    The Finest Filters new and improved range of external canister filters can easily be connected to aquariums up to 1000 litres in size (depending on model), and are suitable for all water types, including coldwater, tropical freshwater and saltwater (marine) aquariums.

    This filter is the 1000l/h model without UV steriliser

    Suitable for aquariums up to 400 litres in size

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  5. 1000l/h Aquarium Fish Tank External Canister Filter with UV Steriliser

    The Finest Filters new and improved range of external canister filters can easily be connected to aquariums up to 1000 litres in size (depending on model), and are suitable for all water types, including coldwater, tropical freshwater and saltwater (marine) aquariums.

    This filter is the 1000l/h model with UV steriliser

    Suitable for aquariums up to 400 litres in size

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  6. 1400l/h Aquarium Fish Tank External Canister Filter with Media

    The Finest Filters new and improved range of external canister filters can easily be connected to aquariums up to 1000 litres in size (depending on model), and are suitable for all water types, including coldwater, tropical freshwater and saltwater (marine) aquariums.

    This filter is the 1400l/h model without UV steriliser

    Suitable for aquariums up to 600 litres in size

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  7. 1400l/h Aquarium Fish Tank External Canister Filter with UV Steriliser
    Rating:
    100 % of 100

    The Finest Filters new and improved range of external canister filters can easily be connected to aquariums up to 1000 litres in size (depending on model), and are suitable for all water types, including coldwater, tropical freshwater and saltwater (marine) aquariums.

    This filter is the 1400l/h model with UV steriliser

    Suitable for aquariums up to 600 litres in size

    Learn More
  8. 2000l/h Aquarium Fish Tank External Canister Filter with Media
    Rating:
    97 % of 100

    The Finest Filters new and improved range of external canister filters can easily be connected to aquariums up to 1000 litres in size (depending on model), and are suitable for all water types, including coldwater, tropical freshwater and saltwater (marine) aquariums.

    This filter is the 2000l/h model without UV steriliser

    Suitable for aquariums up to 1000 litres in size

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  9. 2000l/h Aquarium Fish Tank External Canister Filter with UV Steriliser
    Rating:
    100 % of 100

    The Finest Filters new and improved range of external canister filters can easily be connected to aquariums up to 1000 litres in size (depending on model), and are suitable for all water types, including coldwater, tropical freshwater and saltwater (marine) aquariums.

    This filter is the 2000l/h model with UV steriliser

    Suitable for aquariums up to 1000 litres in size

    Learn More
  10. Hidom EX-1000 External Aquarium Fish Tank Canister Filter With Media -1000l/h

    Hidom EX Range External Canister Filters Complete with Media - Suitable for Freshwater, Coldwater and Marine Aquariums

    3 Models Available EX-1000 (1000 litres per hour), EX-1200 (1200 litres per hour) and EX-1500 (1500 litres per hour)

    The efficient Hidom EX external aquarium filter system utilises a multi-stage approach to filtration. Filtering aquarium tank water through internal layered baskets filled with assorted filter media material it provides extremely thorough biological, mechanical and chemical filtration.    

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  11. Hidom EX-1200 External Aquarium Fish Tank Canister Filter With Media -1200l/h

    Hidom EX Range External Canister Filters Complete with Media - Suitable for Freshwater, Coldwater and Marine Aquariums

    3 Models Available EX-1000 (1000 litres per hour), EX-1200 (1200 litres per hour) and EX-1500 (1500 litres per hour)

    The efficient Hidom EX external aquarium filter system utilises a multi-stage approach to filtration. Filtering aquarium tank water through internal layered baskets filled with assorted filter media material it provides extremely thorough biological, mechanical and chemical filtration.    

    Learn More
  12. Hidom EX-1500 External Aquarium Fish Tank Canister Filter With Media -1500l/h

    Hidom EX Range External Canister Filters Complete with Media - Suitable for Freshwater, Coldwater and Marine Aquariums

    3 Models Available EX-1000 (1000 litres per hour), EX-1200 (1200 litres per hour) and EX-1500 (1500 litres per hour)

    The efficient Hidom EX external aquarium filter system utilises a multi-stage approach to filtration. Filtering aquarium tank water through internal layered baskets filled with assorted filter media material it provides extremely thorough biological, mechanical and chemical filtration.    

    Learn More

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