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Aquarium Advice

What Are the Best Aquarium Filters?

Aquarium filters form an integral component of any quality, healthy aquarium. The filter provides the cornerstone of the tank’s ecosystem and, without it, the balance of life in your aquarium would most likely become unstable and inhabitable to many forms of aquatic life.


Whether internal or external, a good aquarium filter delivers this essential ecological stabilisation. As a fish keeper it’s important that you know which are the best aquarium filters, and why, so our team at Pond Planet has compiled a list of our favourite filters; read on below to find out more.


Internal Filters


Internal filters are ideal for small to medium-sized aquariums. Popular, high-quality filters from the likes of Fluval and Interpet are easy to install and incredibly convenient to maintain, offering the perfect hands-off approach to keeping your fish healthy and happy.


Fluval U2 Underwater Filter


The Fluval U2 is a popular mid-range internal filter that offers all the bells and whistles of the very best on the market.


With complete 3-stage filtration, including BioMax biological filtration, the U2 offers many versatile features that make it ideal for a range of freshwater, marine and reptile life, including a three-way flow control, an integrated spray bar, a convenient flip-top lid for easy access and quick maintenance, as well as the ability to be installed both horizontally and vertically depending on the type of tank you own and the depth of the water.


Interpet PF2 Internal Power Filter



The Interpet PF2 is another powerful mid-range all-rounder for a variety of aquariums. With triple action filtration for aquariums up to 90 litres, the PF2 is one of the most intelligent, versatile and easy-to-use internal filters out there.


Comprised of a unique cradle fit, the PF2’s filters are incredibly easy to fit and maintain, while it also features the patented Aqua Valve System, which prevents waste materials from spilling back into the aquarium when removing the filter for maintenance.


External Filters



External filters provide a robust means of filtration for larger sized tanks, or for those who have a little extra storage space available, allowing them to maximise the space inside the aquarium itself.


At Pond Planet you’ll find some fantastic external filters from the likes of JBL and Oase, both of which are renowned for their market-leading approach to keeping your aquarium’s ecosystem ticking over and its inhabitants in perfect health.


JBL CristalProfi e902 Greenline External Filter


A step up from your mid-range aquarium filters, the JBL CristalProfi e902 provides high-quality filtration for aquariums sized between 90 and 300 litres.


Fully equipped and ready to connect straight out of the box, the e902 is suitable for the complete and effective cleaning of both freshwater and saltwater aquariums. Don’t be daunted by its mouthful of a name, the CristalProfi e902 is in fact incredibly easy to use; featuring an in-built quick-start button, a simple assembly process, quiet efficient running and a patented filter system that is extremely easy to clean and maintain.


Oase FiltoSmart Thermo 300 External Filter


The similarly-priced Oase FiltoSmart Thermo 300, as the name suggests, also provides the efficient filtration of up to 300 litres of water, while Oase itself provides external filters for aquariums up to 600 litres in capacity.


The Thermo 300 also offers full professional mechanical and biological filtration for both freshwater and saltwater tanks. Its compact design and quiet running make it a popular choice among aquarium owners, while also boasting some handy, standout features such as an automated shut-off function to prevent water loss while cleaning and adjustable water flow outputs.


These are four of our best and most competitively-priced internal and external filters for small to medium sized aquariums from some of the industry’s top, trusted manufacturers. With Pond Planet, you can be sure that you’re being provided with only the best products and a fantastic service.


Is there anything else that you’d like to know about the filters we offer? Do you need advice on which filter would be best for your aquarium? Don’t hesitate to get in touch with us below on social media, where our friendly, expert staff will be happy to help!