Best Aquarium Filters & Pumps — Up to 68 Litre (2026)
1 aquarium filters & pumps matching capacity “Up to 68 Litre”, hand-picked from UK Amazon listings.
Not sure which one to pick? Read our How to Care for & Maintain Your Aquarium Filters & Pumps guide.
Maintaining a healthy environment for your smaller aquarium fish requires an appropriately sized filter and pump combination. This selection focuses on units capable of effectively processing water volumes up to 68 litres, ideal for nano aquariums and smaller setups. These filters utilise powerful pumps to circulate the water, removing debris and maintaining beneficial oxygen levels – crucial for your aquatic friends’ wellbeing. Choosing a filter with sufficient capacity is paramount; insufficient flow can lead to poor water quality, while excessive flow might stress delicate fish.
#1 Pick
Interpet Internal Aquarium Fish Tank PF1 Power Filter, Cleans Water, for Coldwater & Tropical Aquariums Up to 68 Litre, Black/Blue- Up to 68 Litre
£15.69
Pros
- One of the best-selling internal filters on Amazon UK with thousands of reviews
- Simple suction-cup mounting and easy-clean cartridge for quick maintenance
- Rated for tanks up to 68 litres, covering most starter aquariums
Cons
- Cartridge replacements are an ongoing running cost
FAQ
What kind of fish are suitable for an aquarium up to 68 litres?+
Smaller species like neon tetras, guppies, and corydoras catfish generally thrive in aquariums this size. Larger goldfish or bettas should be avoided due to their increased bioload requirements.
How often do I need to clean the filter media?+
The frequency of cleaning depends on your tank’s bioload; typically, you’ll want to replace disposable cartridges every 2-4 weeks and sponge filters weekly. Rinse sponges gently in aquarium water to avoid disrupting beneficial bacteria.
What kind of pump flow rate should I be looking for?+
For a 68 litre tank, aim for a pump flow rate between 50-80 litres per hour (LPH). This ensures adequate water circulation and doesn’t overwhelm the filtration system.
Can I use an air stone with this filter?+
Yes, many of these pumps are compatible with air stones. Adding an air stone will increase oxygen levels in your aquarium which is beneficial for fish respiration and helps to reduce harmful ammonia build-up.
What type of filter media should I use?+
A combination of mechanical (e.g., sponges), chemical (e.g., activated carbon), and biological (e.g., ceramic rings) media is recommended for optimal filtration performance. Ensure the media fits within your chosen filter unit.
How does the pump affect water temperature?+
The pump’s circulation helps to distribute heat evenly throughout the tank, preventing localised hot spots. Consider using a small heater if maintaining a stable temperature is crucial for your fish species.
Are these filters suitable for beginners?+
Many of these units are user-friendly and ideal for novice aquarists. However, thorough research into your chosen fish’s specific needs remains essential.
How do I connect the pump to the filter unit?+
Most pumps connect using standard hose fittings. Ensure a tight seal to prevent leaks and maintain optimal flow. Check the manufacturer's instructions for specific connection details.
What are the typical noise levels of these filters?+
Generally, these pumps operate quietly. However, larger units might produce some background noise; read customer reviews for feedback on specific models.
Can I use a different type of filter cartridge?+
While some units are designed for specific cartridges, many allow the use of compatible third-party media. Always check compatibility before purchasing additional filters.