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Aquarium Internal Filters

Fish tank internal filters sit inside your aquarium, rather than outside of it. For this reason, aquarium internal filters are often better suited to small to medium-sized fish tanks that are home to small and medium-sized fish. Fish tank internal filters are available in multiple styles, including undergravel filters, canisters and (the most popular choice), sponge filters.

Sponge filters are among the most common types of fish tank internal filters because they provide both mechanical and biological filtration and are low cost. They are also beneficial for breeding tanks, as the sponge does not trap fish fry. When using aquarium internal filters, you will also need an aquarium air pump and probably some check valves to keep your system secure.  

Choosing the right size of fish tank filters will depend on the size of your aquarium. The Hidom Internal Fish Tank Filter with Spraybar comes in multiple sizes, starting at 200l/h and going up to 1000l/h. For an even larger capacity tank, the Hidom 1600l/h Internal Aquarium Fish Tank Filter can cope with 1600l/h and so is well suited to bigger tanks.

For very large tanks, you may want to consider external filters. Although fish tank internal filters are efficient, they work better in moderately sized tanks with fish and plants that do not produce excessive waste. If you have an aquarium with lots of guppies for example, an external filter will clear the tank more effectively. That being said, aquarium internal filters work excellently in the right conditions, are easy to fit, and inexpensive to buy.

All fish tank internal filters from Finest Filters come with sponge filter media included, and we have a wide selection that can be used for marine or freshwater tanks. Shop fish tank filters to build your aquarium filtration system and keep your fish tank thriving. 

Filters

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Hidom 300l/h Internal Aquarium Fish Tank Filter with Spraybar (AP-600L)

£0.00 - £0.00
£0.00
£9.45
£9.45 - £9.45
£9.45
In stock

You are purchasing a high quality 300l/h internal power filter suitable for use in aquariums up to 60 litres in size. Our internal filters come co...

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£0.00 - £0.00
£0.00
£9.45
£9.45 - £9.45
£9.45

Hidom 200l/h Internal Aquarium Fish Tank Filter with Spraybar (AP-300L)

£0.00 - £0.00
£0.00
£8.99
£8.99 - £8.99
£8.99
In stock

You are purchasing a high quality 200l/h internal power filter suitable for use in aquariums up to 40 litres in size. Our internal filters come co...

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£0.00 - £0.00
£0.00
£8.99
£8.99 - £8.99
£8.99

Hidom 350l/h Internal Aquarium Fish Tank Filter with Spraybar (AP-650L)

£0.00 - £0.00
£0.00
£9.99
£9.99 - £9.99
£9.99
In stock

You are purchasing a high quality 300l/h internal power filter suitable for use in aquariums up to 70 litres in size. Our internal filters come co...

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£0.00 - £0.00
£0.00
£9.99
£9.99 - £9.99
£9.99

JUP-01 800l/h Internal Fish Tank Aquarium Filter with 9w UV Steriliser

£0.00 - £0.00
£0.00
£32.99
£32.99 - £32.99
£32.99
In stock

You are purchasing a high quality aquarium internal filter, with built in UV steriliser suitable for aquariums up to 160 litres.The addition of a U...

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£0.00 - £0.00
£0.00
£32.99
£32.99 - £32.99
£32.99

Undergravel Aquarium Filter Kit's (Various Sizes)

£0.00 - £0.00
£0.00
£6.49 - £13.99
£6.49 - £13.99
£6.49
In stock

Finest Filters Undergravel filter tray – a proven very efficient biological and mechanical filter. Placed underneath the gravel in the aquarium. Th...

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£0.00 - £0.00
£0.00
£6.49 - £13.99
£6.49 - £13.99
£6.49

Hidom 1000l/h Internal Aquarium Fish Tank Filter (AP-1350L)

£0.00 - £0.00
£0.00
£13.99
£13.99 - £13.99
£13.99
In stock

The Hidom APF range of internal filters are ideal for both freshwater and marine aquariums from 100 to 500 litres in size. These filters come comp...

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£0.00 - £0.00
£0.00
£13.99
£13.99 - £13.99
£13.99

Hidom 1000l/h Internal Aquarium Fish Tank Filter with Spraybar (AP-1500L)

£0.00 - £0.00
£0.00
£14.99
£14.99 - £14.99
£14.99
In stock

You are purchasing a high quality 1000l/h internal power filter suitable for use in aquariums up to 150 litres in size. Our internal filters come ...

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£0.00 - £0.00
£0.00
£14.99
£14.99 - £14.99
£14.99

Hidom 600l/h Internal Fish Tank Aquarium Filter with Spraybar (AP-1000L)

£0.00 - £0.00
£0.00
£11.99
£11.99 - £11.99
£11.99
In stock

You are purchasing a high quality 600l/h internal power filter suitable for use in aquariums up to 80 litres in size. Our internal filters come co...

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£0.00 - £0.00
£0.00
£11.99
£11.99 - £11.99
£11.99

JUP-02 500l/h Internal Aquarium Filter with 5w UV Steriliser

£0.00 - £0.00
£0.00
£29.99
£29.99 - £29.99
£29.99
In stock

You are purchasing a high quality aquarium internal filter, with built in UV steriliser suitable for aquariums up to 100 litres.The addition of a U...

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£0.00 - £0.00
£0.00
£29.99
£29.99 - £29.99
£29.99

Hidom 800l/h Internal Aquarium Fish Tank Filter (AP-1200L)

£0.00 - £0.00
£0.00
£12.49
£12.49 - £12.49
£12.49
In stock

The Hidom APF range of internal filters are ideal for both freshwater and marine aquariums from 100 to 500 litres in size. These filters come comp...

View full details
£0.00 - £0.00
£0.00
£12.49
£12.49 - £12.49
£12.49

Hidom 2200l/h Internal Aquarium Fish Tank Filter (AP-3000L)

£0.00 - £0.00
£0.00
£22.99
£22.99 - £22.99
£22.99
In stock

The Hidom APF range of internal filters are ideal for both freshwater and marine aquariums from 100 to 500 litres in size. These filters come comp...

View full details
£0.00 - £0.00
£0.00
£22.99
£22.99 - £22.99
£22.99

Hidom 1600l/h Internal Aquarium Fish Tank Filter (AP-2000L)

£0.00 - £0.00
£0.00
£18.99
£18.99 - £18.99
£18.99
In stock

The Hidom APF range of internal filters are ideal for both freshwater and marine aquariums from 100 to 500 litres in size. These filters come comp...

View full details
£0.00 - £0.00
£0.00
£18.99
£18.99 - £18.99
£18.99

Hidom 1000l/h Internal Aquarium Fish Tank Filter (AP-1350F)

£0.00 - £0.00
£0.00
£15.99
£15.99 - £15.99
£15.99
In stock

The Hidom APF range of internal filters are ideal for both freshwater and marine aquariums from 100 to 350 litres in size. These filters come comp...

View full details
£0.00 - £0.00
£0.00
£15.99
£15.99 - £15.99
£15.99

Hidom 1200l/h Internal Aquarium Fish Tank Filter (AP-1600L)

£0.00 - £0.00
£0.00
£16.99
£16.99 - £16.99
£16.99
In stock

The Hidom APF range of internal filters are ideal for both freshwater and marine aquariums from 100 to 500 litres in size. These filters come comp...

View full details
£0.00 - £0.00
£0.00
£16.99
£16.99 - £16.99
£16.99

Aquarium Sponge Internal Bio Filter With Built In Pump

£0.00 - £0.00
£0.00
£17.99
£17.99 - £17.99
£17.99
In stock

Ultimate Filtration Solution: Aquarium Sponge Filter with Built-In Pump and Ceramic Bio Media Transform your aquarium (up to 120L) into a thriving ...

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£0.00 - £0.00
£0.00
£17.99
£17.99 - £17.99
£17.99

Hidom 800l/h Internal Aquarium Fish Tank Filter (AP-1200F)

£0.00 - £0.00
£0.00
£12.99
£12.99 - £12.99
£12.99
In stock

The Hidom APF range of internal filters are ideal for both freshwater and marine aquariums from 100 to 350 litres in size. These filters come comp...

View full details
£0.00 - £0.00
£0.00
£12.99
£12.99 - £12.99
£12.99

Double Sponge Internal Bio Filter With Built In Pump

£0.00 - £0.00
£0.00
£25.99
£25.99 - £25.99
£25.99
In stock

Ultimate Filtration Solution: Aquarium Double Sponge Filter with Built-In Pump and Ceramic Bio Media Transform your aquarium (up to 210L) into a th...

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£0.00 - £0.00
£0.00
£25.99
£25.99 - £25.99
£25.99

Hidom 1600l/h Internal Aquarium Fish Tank Filter (AP-2000F)

£0.00 - £0.00
£0.00
£22.99
£22.99 - £22.99
£22.99
In stock

The Hidom APF range of internal filters are ideal for both freshwater and marine aquariums from 100 to 350 litres in size. These filters come comp...

View full details
£0.00 - £0.00
£0.00
£22.99
£22.99 - £22.99
£22.99

Hidom 1200l/h Internal Aquarium Fish Tank Filter (AP-1600F)

£0.00 - £0.00
£0.00
£17.99
£17.99 - £17.99
£17.99
In stock

The Hidom APF range of internal filters are ideal for both freshwater and marine aquariums from 100 to 350 litres in size. These filters come comp...

View full details
£0.00 - £0.00
£0.00
£17.99
£17.99 - £17.99
£17.99

Hidom Internal Aquarium Filter 2000l/h

£0.00 - £0.00
£0.00
£24.99
£24.99 - £24.99
£24.99
In stock

Hidom Internal Aquarium Filter 2000l/h For Tropical or Marine Aquariums Upto 400L Create a healthy and thriving aquatic environment with the 2000l/...

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£0.00 - £0.00
£0.00
£24.99
£24.99 - £24.99
£24.99

Compatible Interpet CPF Replacement Filter Set

£0.00 - £0.00
£0.00
£6.49 - £9.49
£6.49 - £9.49
£6.49
In stock

Finest-Filters Compatible Interpet CPF Filter Service Kits Available for CPF1, CPF2 and CPF3 modelsDesigned as high-quality, great-value replacemen...

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£0.00 - £0.00
£0.00
£6.49 - £9.49
£6.49 - £9.49
£6.49