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Fish Tank Filters

Fish Tank Filters

A filtration system is essential in order to keep your fish tank running smoothly. Gone are the days where you can simply place your gold fish in a tank of water with little more than a bridge to swim through. The purpose of a filter is to remove excess food, decaying matter, dangerous chemicals and fish waste products from the water.

If this waste and debris is not removed, not only can the tank look dirty, but there can also be a build up of toxins which can harm the fish and plants. 

There are three types of filtration: biological, mechanical and chemical, and at Swell we stock a wide range of aquarium filters which have been designed to take on all three filtration methods. In order for your filter to do its job properly, you'll need to buy filter media to put inside.

Whether you're after an internal filter to sit inside your aquarium or an external filter to sit on the outside, there are a wide variety to choose from. It's worth bearing in mind that some fish tanks already have a filter included, along with a fish tank heater and aquarium lighting to get you started.

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API
API Rena Nexx External Filter http://www.swelluk.com/img/shop/thumb/api_rena_nexx_filter.jpg The API Rena Nexx External Filter uses two chambers of crystal filtration to produce outstanding water quality... £69.99

API Rena Nexx External Filter

The API Rena Nexx External Filter uses two chambers of crystal filtration to produce outstanding water quality...

0 Reviews
In stock RRP £104.99 Save £35.00 £69.99 View
API
API Rena Nexx External Filter Extension http://www.swelluk.com/img/shop/thumb/api_rena_nexx_filter_extension.jpg The API Rena Nexx External Filter Extension allows you to add to your existing API Rena Nexx External Filter... £49.99

API Rena Nexx External Filter Extension

The API Rena Nexx External Filter Extension allows you to add to your existing API Rena Nexx External Filter...

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In stock RRP £74.99 Save £25.00 £49.99 View
Aqua Medic
Aqua Medic Oceanrunner Powerfilter PF1000 1000lph http://www.swelluk.com/img/shop/thumb/aquarium-internal-filter-oceanrunner-powerfilter.jpg The Aqua Medic Oceanrunner Powerfilter 1000 is a compact aquarium power head pump, combined with a mechanical... £6.69

Aqua Medic Oceanrunner Powerfilter PF1000 1000lph

The Aqua Medic Oceanrunner Powerfilter 1000 is a compact aquarium power head pump, combined with a mechanical...

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From £6.69 View
Aqua Medic
Aqua Medic OFB Overflow Boxes 2500/5000 l/h http://www.swelluk.com/img/shop/thumb/overglow-boxes-type1and 2.jpg Aqua Medic Overflow Boxes are mounted to the outside of the aquarium For the connection to an under counter... £124.99

Aqua Medic OFB Overflow Boxes 2500/5000 l/h

Aqua Medic Overflow Boxes are mounted to the outside of the aquarium For the connection to an under counter...

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From £124.99 View
Aqua Medic
Aqua Medic Riff 500 Cabinet Reef Filtration System 500 ltr http://www.swelluk.com/img/shop/thumb/aqua-medic_Riff-500.jpg The Aqua Medic Riff 500 filter system, available from Swell UK, is a compact 3-stage unit for use in the... £449.99

Aqua Medic Riff 500 Cabinet Reef Filtration System 500 ltr

The Aqua Medic Riff 500 filter system, available from Swell UK, is a compact 3-stage unit for use in the...

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In stock RRP £496.99 Save £47.00 £449.99 View
Aqua Medic
Aqua Medic Skim Box http://www.swelluk.com/img/shop/thumb/aqua-medic_skim-box.jpg The Aqua Medic Skim Box is a highly effective surface skimmer is designed for use in both marine and freshwater... £8.49

Aqua Medic Skim Box

The Aqua Medic Skim Box is a highly effective surface skimmer is designed for use in both marine and freshwater...

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In stock RRP £8.79 Save £0.30 £8.49 View
Eden
Eden 501 External Filter http://www.swelluk.com/img/shop/thumb/eden_501.jpg Supplied complete with intake system, hoses and connecting elbows and with a spray-bar outlet for better... £6.99

Eden 501 External Filter

Supplied complete with intake system, hoses and connecting elbows and with a spray-bar outlet for better...

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From £6.99 View
Eden
Eden External Filters http://www.swelluk.com/img/shop/thumb/eden_511.jpg The EDEN 511 External filter is a professional canister which can be used in both fresh and marine tanks. Its... £9.99

Eden External Filters

The EDEN 511 External filter is a professional canister which can be used in both fresh and marine tanks. Its...

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From £9.99 View
Eden
Eden External Filters with Heater http://www.swelluk.com/img/shop/thumb/eden_511.jpg The Eden 500 series external aquarium filters can be installed underneath or behind any marine or freshwater... £82.99

Eden External Filters with Heater

The Eden 500 series external aquarium filters can be installed underneath or behind any marine or freshwater...

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From £82.99 View
Eden
Eden Internal Filters http://www.swelluk.com/img/shop/thumb/eden_304.jpg 304 Ideal for goldfish bowls, small tanks for fishes and turtles. Despite its extremely small size the total... £12.99

Eden Internal Filters

304 Ideal for goldfish bowls, small tanks for fishes and turtles. Despite its extremely small size the total...

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From £12.99 View
Eden
Eden Multi Stage Internal Filters http://www.swelluk.com/img/shop/thumb/eden_325_328.jpg These internal filters provide clear, clean water for aquaria up to 200l, thanks to the high performance pump... £24.99

Eden Multi Stage Internal Filters

These internal filters provide clear, clean water for aquaria up to 200l, thanks to the high performance pump...

1 Review
From £24.99 View
Eheim
Eheim 2171 Professionel 3 250T External Filter http://www.swelluk.com/img/shop/thumb/eheimpro3_250_2_t_box.jpg The Eheim 2171 Professionel 3 250T External Thermo Filter is for Aquariums up to 250 Litres, with its unique... £248.37

Eheim 2171 Professionel 3 250T External Filter

The Eheim 2171 Professionel 3 250T External Thermo Filter is for Aquariums up to 250 Litres, with its unique...

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In stock RRP £300.90 Save £52.53 £248.37 View
Eheim
Eheim 2173 Professionel 3 350T External Filter http://www.swelluk.com/img/shop/thumb/250T.jpg The Eheim 2173 Professionel 3 350T External Thermo Filter is for Aquariums up to 350 Litres (77 gallons), with... £302.35

Eheim 2173 Professionel 3 350T External Filter

The Eheim 2173 Professionel 3 350T External Thermo Filter is for Aquariums up to 350 Litres (77 gallons), with...

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In stock RRP £366.40 Save £64.05 £302.35 View
Eheim
Eheim Aquaball Internal Filters 45-180 http://www.swelluk.com/img/shop/thumb/Eheim-Aquaball-Internal-Filter-1.jpg The Eheim internal filters are a fantastic product as they are a completely flexible module system with a... £25.76

Eheim Aquaball Internal Filters 45-180

The Eheim internal filters are a fantastic product as they are a completely flexible module system with a...

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From £25.76 View
Eheim
Eheim Classic External Filters Plus http://www.swelluk.com/img/shop/thumb/classic_external_filter1-1.jpg The Eheim Classic External Filters feature carefully tailored external canister filters, equipped with high... £79.14

Eheim Classic External Filters Plus

The Eheim Classic External Filters feature carefully tailored external canister filters, equipped with high...

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From £79.14 View
Eheim
Eheim ECCO Pro http://www.swelluk.com/img/shop/thumb/eheim-ecco-1.jpg The Eheim Ecco Pro are energy efficient and economical and also easy to handle. They now include filter media.... £84.15

Eheim ECCO Pro

The Eheim Ecco Pro are energy efficient and economical and also easy to handle. They now include filter media....

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From £84.15 View
Eheim
Eheim Intake Pipe 16mm http://www.swelluk.com/img/shop/thumb/eheimhook.jpg The Eheim Intake Pipe is a hard wearing intake pipe, with a variety of uses.Made for use with the Eheim 16/22mm... £5.99

Eheim Intake Pipe 16mm

The Eheim Intake Pipe is a hard wearing intake pipe, with a variety of uses.Made for use with the Eheim 16/22mm...

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In stock RRP £8.30 Save £2.31 £5.99 View
Eheim
Eheim Professional 3e 2178 http://www.swelluk.com/img/shop/thumb/eheim_pro_2178.jpg The Eheim Professional 3e 2178 is an electronic filter designed for freshwater aquariums between 300 and 600... £491.22

Eheim Professional 3e 2178

The Eheim Professional 3e 2178 is an electronic filter designed for freshwater aquariums between 300 and 600...

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In stock RRP £577.90 Save £86.68 £491.22 View
Eheim
Eheim Professionel 3 2080 http://www.swelluk.com/img/shop/thumb/Eheim 2080 Professional 3 XL (no media).jpg The Eheim Professionel 3 2080 is a large easy-to-use high power filter that incorporates lots of new features.... £379.95

Eheim Professionel 3 2080

The Eheim Professionel 3 2080 is a large easy-to-use high power filter that incorporates lots of new features....

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In stock RRP £460.40 Save £80.45 £379.95 View
Eheim
Eheim Professionel 3 250, 350 and 600 http://www.swelluk.com/img/shop/thumb/eheim-2073-professional-3-image.jpg The Eheim Professionel 3 250, 350 and 600 are high output external filter pumps with a maximum capacity,... £146.54

Eheim Professionel 3 250, 350 and 600

The Eheim Professionel 3 250, 350 and 600 are high output external filter pumps with a maximum capacity,...

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From £146.54 View
Eheim
Eheim Professionel 3 Electronic Filters 2076 and 2078 http://www.swelluk.com/img/shop/thumb/2076-1.jpg Eheim Professionel 3e Electronic External Filters. The Eheim Professional 3e has a new touch pad interface for... £325.72

Eheim Professionel 3 Electronic Filters 2076 and 2078

Eheim Professionel 3e Electronic External Filters. The Eheim Professional 3e has a new touch pad interface for...

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From £325.72 View
Eheim
Eheim Professionel 3 Thermo Filters 2180 http://www.swelluk.com/img/shop/thumb/Professionel 3 2180 Thermo Filter.jpg The Eheim Professionel 3 Thermo Filter is a large easy-to-use high power Freshwater Thermo filter. The Eheim... £498.95

Eheim Professionel 3 Thermo Filters 2180

The Eheim Professionel 3 Thermo Filter is a large easy-to-use high power Freshwater Thermo filter. The Eheim...

0 Reviews
In stock RRP £604.60 Save £105.65 £498.95 View
Fluval
Fluval External Filters http://www.swelluk.com/img/shop/thumb/306.jpg For outstanding filtration performance choose the Fluval '06' External Filter range to provide multi-stage... £71.99

Fluval External Filters

For outstanding filtration performance choose the Fluval '06' External Filter range to provide multi-stage...

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From £71.99 View
Fluval
Fluval FX6 External Filter http://www.swelluk.com/img/shop/thumb/Fluval FX6 External Filter1.JPG The Fluval FX6 is an external filter with smart Pump technology ensures optimum flow. Fluval FX6 Smart Pump... £224.99

Fluval FX6 External Filter

The Fluval FX6 is an external filter with smart Pump technology ensures optimum flow. Fluval FX6 Smart Pump...

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In stock RRP £299.99 Save £75.00 £224.99 View
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