10 bestExternal Aquarium Filtersof April 2025
112M consumers helped this year.
1
Fluval 207 External Filter
Fluval
10.0
2
Fluval 107 External Filter, 1 kg
Fluval
10.0
3
allpondsolutions 1000EF Aquarium External Fish Tank Water Filter for Coldwater, Tropical or Marine Aquariums, for Tanks Up to 400 Litres – Includes Filter Media, hose and Spray Bar - Full Kit.
allpondsolutions
9.9
4
allpondsolutions EF-150 Aquarium External Fish Tank Water Filter for Coldwater, or Tropical Aquariums, for Tanks Up to 150 Litres – Includes Filter Media, hose and Spray Bar - Full Kit.
allpondsolutions
9.8
5
allpondsolutions EF-250 Aquarium External Fish Tank Water Filter for Coldwater, or Tropical Aquariums, for Tanks Up to 250 Litres – Includes Filter Media, hose and Spray Bar - Full Kit.
allpondsolutions
9.7
4% off
6
Fluval FX6 High Performance Canister Filter
Fluval
9.5
7
Fluval FX2 External Aquarium Filter
Fluval
9.3
8
allpondsolutions EFX+ Aquarium External Fish Tank Water Filter with 9w UV Steriliser for Coldwater, Tropical or Marine Aquariums, Tanks Up to 1000 Litres – Includes Filter Media Full Kit.
allpondsolutions
9.1
9
FiltoSmart Thermo 200 External Aquarium Filter - Oase
Oase
8.8
10
allpondsolutions EF2+ Aquarium External Fish Tank Water Filter with 9w UV Steriliser for Coldwater, Tropical or Marine Aquariums, for Tanks Up to 600 Litres – Includes Filter Media - Full Kit.
allpondsolutions
8.6
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A Guide to Selecting the Best External Aquarium Filters
Choosing the right external aquarium filter is crucial for maintaining a healthy and clean environment for your aquatic life. External filters are popular because they are efficient, easy to maintain, and do not take up space inside the aquarium. When selecting an external filter, consider the size of your aquarium, the type of fish and plants you have, and how much maintenance you are willing to perform. Understanding the key specifications will help you make an informed decision that suits your specific needs.
Flow Rate
Flow rate refers to the amount of water the filter can process in a given time, usually measured in gallons per hour (GPH) or liters per hour (LPH). This is important because it determines how effectively the filter can clean the water. A higher flow rate means more water is being filtered, which is generally better for larger tanks. For smaller tanks, a lower flow rate may be sufficient and prevent excessive water movement that can stress fish. To choose the right flow rate, consider the size of your aquarium; a good rule of thumb is to aim for a filter that can process at least four times the total volume of your tank per hour.
Filter Media
Filter media are the materials inside the filter that clean the water. They can be mechanical, biological, or chemical. Mechanical media remove debris, biological media support beneficial bacteria that break down waste, and chemical media remove impurities like toxins. The importance of filter media lies in their ability to maintain water quality. When choosing filter media, consider the specific needs of your aquarium. For example, if you have a heavily stocked tank, you might need more biological media to handle the waste. Look for filters that offer customizable media options so you can tailor the filtration to your aquarium's needs.
Noise Level
Noise level refers to how loud the filter operates. This is important for both the comfort of your aquatic life and your own peace of mind. A noisy filter can be disruptive, especially if your aquarium is in a living space or bedroom. Filters are generally categorized as quiet, moderate, or loud. If noise is a concern, look for filters that are specifically designed to operate quietly. Consider reading reviews or testing the filter in-store if possible to ensure it meets your noise level expectations.
Ease of Maintenance
Ease of maintenance refers to how simple it is to clean and maintain the filter. This is important because regular maintenance is necessary to keep the filter functioning properly and to ensure the health of your aquarium. Filters that are easy to disassemble and have accessible parts are generally easier to maintain. When choosing a filter, consider how often you are willing to perform maintenance and look for features like self-priming, easy access to media, and clear instructions. A filter that is easy to maintain will save you time and effort in the long run.
Size and Compatibility
Size and compatibility refer to the physical dimensions of the filter and how well it fits with your aquarium setup. This is important because the filter needs to fit in the space you have available and be compatible with your tank's design. Filters come in various sizes, so measure the space where you plan to place the filter and ensure it will fit comfortably. Also, consider the type of aquarium you have, such as freshwater or saltwater, as some filters are better suited for specific environments. Choose a filter that matches your tank's requirements and fits seamlessly into your setup.
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