Aquarium Internal Filters

This type of filter utilises an electrically powered centrifugal pump to draw water through the filter material, which is normally a sponge. They may have additional chambers for absorption media or additional mechanical / biological media. They generally create a more powerful circulation than air-powered filters. 

Internal filters are ideal for aquariums in the 2ft - 4ft size range, and are useful in combination with external canister filters for large aquariums. They also provide useful extra mechanical filtration when used in conjunction with undergravel filtration.

Please select from the Aquarium Internal Filters below to buy at our best prices:

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Eheim Pick Up 45 2006 Internal Aquarium Filter

Eheim Pick Up 45 2006 Internal Aquarium Filter

A filter is an important part of a healthy aquarium, they not only help to keep the water clean and clear, they will also keep it from becoming stagnant. The Eheim Pickup range is easy to clean, by using an intelligent design for maintenance. The motor casing and cable remain in place while the filter compartment can be easily removed. Pickup 2006 Specification: For up to 45 Litres / 10 Gallons. 50-180 litres per hour. Dimensions: 135 x 50 x 63mm. Complete with filter cartridge, easily adjustable outflow, twist outlet for outflow direct, water inlet situated at the bottom for maximum filtration and practical suction cup attachment.

RRP £19.99
£18.99
Eheim Pick Up 60 2008 Internal Aquarium Filter

Eheim Pick Up 60 2008 Internal Aquarium Filter

A filter is an important part of a healthy aquarium, they not only help to keep the water clean and clear, they will also keep it from becoming stagnant. The Eheim Pickup range is easy to clean, by using an intelligent design for maintenance. The motor casing and cable remain in place while the filter compartment can be easily removed. Pickup 2008 Specification: For up to 60 Litres / 13 Gallons. 150-300 litres per hour. Dimensions: 163 x 75 x 96mm. 4 Watts. Complete with filter cartridge, easily adjustable outflow, twist outlet for outflow direct, water inlet situated at the bottom for maximum filtration and practical suction cup attachment.

RRP £23.00
£21.99
Eheim Pick Up 160 2010 Internal Aquarium Filter

Eheim Pick Up 160 2010 Internal Aquarium Filter

A filter is an important part of a healthy aquarium, they not only help to keep the water clean and clear, they will also keep it from becoming stagnant. The Eheim Pickup range is easy to clean, by using an intelligent design for maintenance. The motor casing and cable remain in place while the filter compartment can be easily removed. Pickup 2008 Specification: For up to 160 Litres / 35 Gallons. 220-500 litres per hour. Dimensions: 218 x 75 x 96mm. 6 Watts. Complete with filter cartridge, easily adjustable outflow, twist outlet for outflow direct, water inlet situated at the bottom for maximum filtration and practical suction cup attachment.

RRP £25.00
£24.99
Eheim Pick Up 200 2012 Internal Aquarium Filter

Eheim Pick Up 200 2012 Internal Aquarium Filter

A filter is an important part of a healthy aquarium, they not only help to keep the water clean and clear, they will also keep it from becoming stagnant. The Eheim Pickup range is easy to clean, by using an intelligent design for maintenance. The motor casing and cable remain in place while the filter compartment can be easily removed. Pickup 2008 Specification: For up to 200 Litres / 44 Gallons. 220-570 litres per hour. Dimensions: 275 x 75 x 96mm. 6 Watts. Complete with filter cartridge, easily adjustable outflow, twist outlet for outflow direct, water inlet situated at the bottom for maximum filtration and practical suction cup attachment.

RRP £34.99
£32.99
Fluval Mini Filter

Fluval Mini Filter

For aquariums upto 45ltr / 12 us gallon. Fluval mini internal aquarium underwater filter. This is a powerful and reliable filter with mulitple applications. Use as the main filter in aquariums or terrariums upto 45lt. Keep it running at all times in your aquarium and the Fluval mini will also provide a fully matured filter ready for immediate use if needed for a hospital/isolation tank.

RRP £21.89
£16.99
Fluval U1 Internal Aquarium Filter SAVE
£8.50

Fluval U1 Internal Aquarium Filter

A great filter for aquariums, terrariums and turtle tanks up to 55 litres in volume with an adjustable flow rate. The filter media is a single foam pad. Ideal as a stand alone filter or as a supplemented filter. Silent and efficient, simple to install and maintain, engineered and manufactured in Italy.

RRP £28.49
£19.99
Fluval U2 Internal Aquarium Filter SAVE
£14.70

Fluval U2 Internal Aquarium Filter

3 stage filtration with BIOMAX for superior aquarium water quality, flip-Top access for quick and easy cartridge replacement and three way flow control make the new Fluval U Series the benchmark in underwater filtration. Features: For aquariums from 45 L to 110 L. 3 way flow control with adjustable output. 2 foam pads, 2 poly/carbon cartridges. 40 g Bio-Max, 1 Venturi, 2 Output diverters, 230 V, 50 Hz, CE/UK Version, 180 cm line cord. For aquariums, terrariums and turtle tanks. Ideal supplemental or stand-alone filter, or for installations where external filtration is not possible. Filters debris and provides optimal biological filtration. Silent and efficient. Simple to install and maintain. Engineered and manufactured in Italy

RRP £42.69
£27.99
Fluval U3 Internal Aquarium Filter SAVE
£16.00

Fluval U3 Internal Aquarium Filter

RRP £54.99
£38.99
Fluval U4 Internal Aquarium Filter Free UK
Delivery*
SAVE
£24.00

Fluval U4 Internal Aquarium Filter

RRP £68.99
£44.99
Marina Slim S10 Power Filter NEW

Marina Slim S10 Power Filter

A very discrete and tidy power filter for aquariums up to 38 litres in volume, perfect for keeping your fish tank clean and healthy. The hang-on design means that most of the filter sits outside your aquarium meaning more space for fish and decorations.

RRP £24.99
£20.99
Marina Slim S15 Power Filter NEW

Marina Slim S15 Power Filter

A very discrete and tidy power filter for aquariums up to 56 litres in volume, perfect for keeping your fish tank clean and healthy. The hang-on design means that most of the filter sits outside your aquarium meaning more space for fish and decorations.

RRP £29.99
£24.99
Marina Slim S20 Power Filter NEW

Marina Slim S20 Power Filter

A very discrete and tidy power filter for aquariums up to 75 litres in volume, perfect for keeping your fish tank clean and healthy. The hang-on design means that most of the filter sits outside your aquarium meaning more space for fish and decorations.

RRP £34.99
£29.99
Interpet Goldfish Bowl Filtration Starter Kit

Interpet Goldfish Bowl Filtration Starter Kit

Fish produce two kinds of waste, solid which can make the water cloudy, and dissolved waste that can make the water toxic.This is unsightly and unhealthy for the fish themselves. Undergravel filtration creates a clear, healthy aquarium by trapping waste matter and removing the toxic fish waste. The pump is housed in a quality, moulded case and the solid base absorbs sound. This is a reliable system with a powerful airflow and carbon impregnated filter which reduces air pollution in the tank very effectively. Suitable for bowls up to 400mm in diameter. Comes with 1 Aqua Air Mini, 1 7/8inch round airstone, 1m airline tubing, 1 undergravel filter plate, 1 filter cartridge and 1 small plastic plant.

£18.49
Marina i25 Power Internal Filter

Marina i25 Power Internal Filter

MARINA i25 Internal Aquarium Filter for Sale. The Marina i25 Internal power filter is a very smart and neat internal filter but very powerful and capable of filtering aquariums up to 25 litres. Safe for both tropical or coldwater goldfish tanks and clips securely onto the side of the aquarium with the powerful suction cups.

£12.99
AquaClear 70 Powerhead Free UK
Delivery*
SAVE
£17.00

AquaClear 70 Powerhead

Adding a powerhead to an undergravel system increases water flow through a gravel substrate and improves its filtering efficiency. It also oxygenates water and, in the process, provides needed oxygen to colonies of beneficial bacteria in the gravel which optimizes their biological filtration capabilities. Reverse Flow Operation - Both forward and reverse water flow. Keeps the substrate cleaner by forcing debris to the top. -- 220 240v - Output without air: 1514 L / 400 U.S. Gal. per hour - Output with air: 1317 L / 348 U.S. Gal. per hour - Reverse Flow: 659 L / 174 U.S. Gal. per hour - Recommended Aquarium -- (1 PH) 283 L / 75 U.S. Gal. -- (2 PH) 567 L / 150 U.S. Gal.

RRP £76.99
£59.99
AquaHabitats Mechanical Filter Bag System NEW

AquaHabitats Mechanical Filter Bag System

High quality bracket which is suitable for 10cm diameter filter bags, the space saving hang on design allows the bracket to be installed on most sumps or aquariums without the need for securing with screws.

From £11.99
Fluval Suction Cups to Suit  All Fluval Filters

Fluval Suction Cups to Suit All Fluval Filters

The ideal mix of beneficial bacteria to make the aquarium water purer and the environment healthy

£2.99
Interpet Internal Power Filter PF Mini

Interpet Internal Power Filter PF Mini

Interpet Internal Power Filter PF Mini. This filter is perfect for small coldwater or tropical aquariums up to 40 litres (9 gallons) Filter foam for bacterial growth to break down fish waste. Carbon foam to remove toxins, discolouration, odour and metals. Fixing cradle. Flow director.

£12.99
Aqua Clear 30 Powerhead SAVE
£13.10

Aqua Clear 30 Powerhead

Adding a powerhead to an undergravel filter system increases water flow through a gravel substrate and improves its filtering efficiency. It also oxygenates water and in the process provides needed oxygen to colonies of beneficial bacteria in the gravel which optimises their biological filtration capabilities. output without air:658 LPH output with air:537 LPH recommended for aquariums up to 113 litres

RRP £48.09
£34.99
Deluxe Pump and Filter Fish Bowl Kit

Deluxe Pump and Filter Fish Bowl Kit

A small round Undergravel filter to fit all Goldfish Bowls, Airstone, tubing and Airpump, a simple to set up filtration system to use with the Gussie Goldfish Starter Kit or in fact any goldfish bowl. Helps keep the water clean and provide a healthy environment for your fish to live in. This kit will also stop the fish lethargically gasping at the water surface due to lack of oxygen. Includes one Carbon Filter cartridge (these should be replaced every 4/6 weeks)

WAS £16.99
NOW £13.99
Hydor Crystal Duo K20 Aquarium Filter

Hydor Crystal Duo K20 Aquarium Filter

WAS £19.99
NOW £15.99
Aqua Clear 20 Powerhead SAVE
£11.60

Aqua Clear 20 Powerhead

Adding a powerhead to an undergravel filter system increases water flow through a gravel substrate and improves its filtering efficiency. It also oxygenates water and in the process provides needed oxygen to colonies of beneficial bacteria in the gravel which optimises their biological filtration capabilities. output without air: 476 LPH output with air: 416 LPH suitable for aquariums up to 75 litres.

RRP £41.59
£29.99
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FREE UK DELIVERY on orders £40.00 or more
£3.95 delivery on orders under £40.00
Aquatics FREE UK DELIVERY on orders £40.00 or more £3.95 delivery on orders under £40.00.