10 Best External Aquarium Filters 2025 in the UK

The Fluval 207 External Filter is a robust option for aquarium owners looking to maintain a clean environment for their fish. One of its standout features is the efficient technology, which ensures a strong and consistent flow rate, making it ideal for aquariums up to 220 litres in volume. It has a powerful motor that provides reliable pumping power, which is crucial for maintaining water circulation and filtration over time.

In terms of noise level, the re-engineered pump design operates up to 25% quieter than previous models, a significant improvement for users who prefer a silent aquarium environment. The ergonomic AquaStop valves are a thoughtful addition, allowing smoother operation and reducing the potential for leaks when performing maintenance. Maintenance is made easier with the unique vertical pre-filter cartridge that offers greater surface area and more effective mechanical filtration. This design allows for independent access to the filter media, which can simplify cleaning tasks and make the entire maintenance process less cumbersome. However, users should still be prepared to regularly check and clean the filter to ensure optimal performance.

Size-wise, the filter is compact, weighing 1.5 kg and measuring 18 x 19 x 42 cm, making it easy to fit into most setups without taking up too much space. Its compatibility with different aquarium sizes and the ease of storage are other attractive features. On the downside, this filter might not be suitable for very large aquariums exceeding its flow rate capacity. Additionally, while it is marketed as easy to maintain, beginners might still find the initial setup a bit challenging without guidance.

The Fluval 107 External Filter is a well-regarded choice for aquarium enthusiasts, offering several appealing features that cater to the needs of maintaining a healthy aquatic environment. A standout feature is its efficient technology construction that promotes powerful pump performance while keeping energy consumption low. This means it can maintain a strong flow rate of 550 liters per hour, making it suitable for smaller to medium-sized aquariums. The filter's motor is designed to deliver consistent pumping power and pressure, which speaks to its durability and reliability over time.

An important aspect for many users is the noise level, and the Fluval 107 excels here with its re-engineered pump, reducing noise by up to 25% compared to previous models. This makes it a great option for those who prefer a quieter aquarium setup. Ease of maintenance is another strength, with features like easy-to-clean components and adjustability, ensuring that regular upkeep does not become a daunting task. Its compact size and lightweight design further enhance its appeal, as it can be easily adapted to fit within various aquarium setups.

However, there are some considerations to keep in mind. While the flow rate is efficient for certain tank sizes, those with larger aquariums might find it lacking in power for their needs. Additionally, while the product dimensions are stated as 1x1x1 cm, this is likely incorrect and could cause confusion when determining compatibility with specific aquariums. The Fluval 107 External Filter is a strong contender for those seeking an energy-efficient, quiet, and easy-to-maintain filter for small to medium aquariums, though larger aquarium owners may need to look for alternatives with higher flow capacities.