Are you looking to upgrade your aquarium filtration system? However, with so many different brands and models of canister filters on the market, it can be tricky to determine which one is best aquarium canister filter for your tank.
Aquarium canister filters are one of the most powerful and customizable filtration options for both freshwater and saltwater tanks. With robust media capacity and strong flow rates, canister filters provide superior mechanical, biological and chemical filtration compared to power filters and other types of aquarium filters. In this guide, we’ll walk you through everything you need to know about choosing the best aquarium canister filter, including detailed reviews of the 8 best canister filters for aquariums in 2024.
First, let’s go over the basics. Aquarium canister filters are external filters that sit underneath or beside your tank. They pull water through intake tubes from the aquarium into a canister filled with different types of filter media. Mechanical media like sponges or filter floss trap debris and particles, while biological media like ceramic rings or bio balls provide surface area for beneficial bacteria to colonize and break down ammonia and nitrites.
After passing through the various stages of media, the water flows back out and into the tank via return tubes and nozzles, completing the filtration cycle. This closed pressurized system allows canister filters to handle heavy bioloads and create strong water circulation in the aquarium.
Compared to other filter types like hang-on-back (HOB) power filters, canister filters offer:
The main downside is the higher upfront cost of canister filters. However, given their exceptional filtering capabilities and longevity, a quality canister filter is well worth the investment for larger aquariums.
Now let’s get into the key factors you should consider when selecting an aquarium canister filter for your tank:
Also Read: Best Aquarium Heater Controllers in 2024.
While selecting Canister filter the following point should be considered to determine which will be the best aquarium canister filter for you.
The size of your aquarium plays a crucial role in determining the best canister filter for aquariums. Different filters have varying flow rates, and it’s important to choose one that can effectively circulate the water in your aquarium. As a general rule, aim for at least four to six times the aquarium’s volume in flow rate per hour.
One of the top specs to check is the filter’s flow rate, measured in gallons per hour (gph) or liters per hour (lph). The canister filter’s flow rate should be adequate for the volume of water in your particular aquarium.
As a general guideline:
Strong water flow and turnover is key for both mechanical and biological filtration. But you also don’t want the flow to be too turbulent or strong for the fish.
Consider the filtration capacity of the canister filter, including the number of filtration stages and the amount of filter media it can accommodate. Mechanical, chemical, and biological filtration are essential for maintaining optimal water quality. Look for filters that offer ample space for filter media and allow customization based on your specific needs.
The overall capacity and design of the filter’s media trays or baskets is another key factor. More media equals better filtration!
Look for a filter that can hold a generous amount of each type of media:
The ability to customize and layer the media is ideal for tailoring the filtration to your aquarium’s needs.
The type and number of fish in your aquarium, as well as their waste production, known as bioload, should be taken into account when choosing a canister filter. Larger fish and heavily stocked aquariums require filters with higher flow rates to effectively remove waste and maintain water quality.
Self-priming canister filters have an electric pump to automatically prime the system and get the water flowing after cleaning or power interruptions. This makes restarting the filter much easier.
Standard filters rely on a manual siphoning process to prime the hoses and start the water flowing again. This can be trickier after maintenance but is still manageable with some effort.
Since canister filters sit outside the tank, noise is a consideration. Look for super quiet filters rated at 45 decibels or less. The pump and impeller design affects the noise level along with the quality of the manufacturer.
As with any filter, occasional cleaning and maintenance will be required to flush out debris and prevent clogging. Look for an aquarium canister filter with quick release valves or disconnect hoses to make opening the unit and accessing the media simple and mess-free.
An easy priming feature also ensures quick and painless restarts after cleaning. Also check that the filter openings provide adequate room for removing and rinsing media when needed.
You want a well-made canister filter built with quality materials that will provide lasting performance for years. Leak-free seals and locking lid clasps are also important.
Pricier filters from reputable brands are recommended for their proven reliability. Avoid cheaper no-name filters which tend to have more issues. Research customer reviews and ratings to ensure you choose a reliable canister filter that will last for years.
Set a budget for your canister filter and look for options that offer the best value for money. Keep in mind that a higher price often reflects better quality and performance, but there are also affordable options available that provide decent filtration.
By considering these factors, you can narrow down your options and choose the best canister filter for your aquarium.
Now that you know what features to look for in an aquarium canister filter, let’s review some of the top models available in 2024.
Here is our top recommendation for best aquarium canister filter. Take a look.
The Fluval FX6 and FX4 are powerful canister filters ideal for large 75-125 gallon aquariums with big fish. With pumping capacities over 500 GPH, these filters offer 6 stages of filtration and premium performance. The FX6 handles larger tanks up to 400 gallons while the FX4 is best for smaller large tanks. Both feature self-priming Smart Pump technology, quiet operation, and clog-proofing. Though expensive, the FX series is a worthwhile investment for large, messy aquariums, providing unparalleled filtration, and could be a best aquarium canister filter for your tank.
Pros
Cons
Installation is a bit tricky – hoses and holders similar to FX6 but smaller gauge. Instructions lacked info on opening water flow valve. Reusable mechanical media it comes with is excellent at catching gunk. Priming is simple with small lever to flood canister. Maintenance made easy with quick connect valves to stop water flow and pop hoses off. Central handle lets you pull out all media baskets from top. Breaking down filter beside tank is easy. One of quietest canisters tested at 51.9 decibels, just a low hum. Best for 40-55 gallon tanks, though rated up to 100 gallons which is too much volume for this filter.
Pros
Cons
The Penn Plax Cascade is a budget-friendly canister filter ideal for medium 30-75 gallon aquariums. Though plain-looking, it delivers strong performance and durability. The Cascade offers customizable flow rate and 360-degree rotating valves. It features easy installation, even for beginners, and a self-priming motor that eliminates manual priming. With 2-5 stages of filtration and spacious trays for media flexibility, this filter provides excellent filtration. The Cascade’s sturdy plastic construction makes it more durable than cheap brands. Overall, it’s a customizable and novice-friendly canister filter that delivers great filtration at an affordable price point.
Pros
Cons
The SunSun HW-304B is the best budget canister filter due to its functionality and built-in UV sterilizer. It provides 3-stage filtration with customizable media trays for mechanical, biological, and chemical filtration. The internal spray bar boosts oxygenation. This filter handles tanks up to 150 gallons at 525 gph flow rate. It has a drip-free shutoff valve for easy maintenance. Though it may require extra priming at first, the SunSun HW-304B delivers great performance and features for the low price.
Pros
Cons
The Eheim Classic external canister filters are best for smaller, overstocked 10-55 gallon aquariums. These filters boast excellent durability and easy maintenance for the price point. They provide ample space for filter media and gentler flow rates, making them ideal for long-finned, messy fish like goldfish and Oscars. The Classic series features solid construction for impressive longevity. Models include the 2211, 2213, 2215, 2217, 2260, and 2262. With their combination of value, durability, and gentle flow, Eheim Classic canisters are a great choice for smaller overstocked tanks.
Pros
Cons
The Polar Aurora External Aquarium Filter comes in sizes for 75-200 gallon tanks. The larger models include a UV light. It is a budget-friendly canister filter option but not for turtles. The filter has customizable media trays and includes chemical, mechanical, and biological media. It features an adjustable spray bar and can connect to undergravel filters. The kit provides everything needed, like hoses and a single-valve disconnect for easy maintenance. It has self-priming capability, rubber feet for quiet operation, and may need an O-ring replacement after a few months. Overall, the Polar Aurora is an affordable canister filter for basic fish tank filtration.
Pros
Cons
The Hydor Professional External Canister Filter comes in 5 sizes for 20-150 gallon aquariums. It is a high-end professional grade filter for freshwater and saltwater use. The 3-stage system has customizable media trays but does not include chemical filtration media. Models range from 2 trays (150) to 5 trays (550), so you may need to combine media types in trays. All include a spray bar for controlled output and oxygenation. The kit provides telescoping intakes, safety locks, and easy manual priming. Though not self-priming, the Hydor operates quietly. With its premium features and performance, it matches its professional-level price point.
Pros
Cons
The Zoo Med Nano 10 External Canister Filter is designed for nano tanks up to 10 gallons. It can be used for freshwater and saltwater. This small canister provides 3-stage filtration and includes media to get started. It has a built-in spray bar and is easy to prime and use for beginners. However, it lacks self-priming and is compact yet still large next to nano tanks under 10 gallons. It must sit at tank level, with short hoses limiting positioning. An adjustable flow control and easy access to media are useful features. Overall, the Nano 10 offers nano tank filtration, but its size and lack of flexibility limit utility for tanks under 10 gallons.
Pros
Cons
Choosing the best aquarium canister filter is not means the maintenance will be ignored. Maintenance is the key to keep your filter usable for a long period of time.
To keep your canister filter running smoothly:
If issues arise, first check:
Still not pumping water? Try re-priming the unit by disconnecting and cleaning the hoses. Check the impeller and all o-rings. Contact manufacturer support for replacement parts if needed.
A: While canister filters don’t need as frequent maintenance as HOB filters, they do require full breakdown and cleaning of the canister every 4-6 months which is more involved. Be prepared to commit more time to canister filter upkeep.
A: The higher price of canister filters pays off through their exceptional filtering capabilities, large media capacity, and long-term durability. Their superior mechanical, biological and chemical filtration makes canisters well worth it for larger tanks.
A: Do a full canister breakdown and cleaning every 4-6 months. Swap out chemical filtration media monthly. Check and rinse biological media every 2-3 months, rinsing in tank water only. Increase frequency if flow seems reduced.
A: Choose a canister filter with a flow rate at least 4-5 times the volume of water in your tank. For example, a 75 gallon tank needs around 300-400+ GPH flow rate. Bigger is usually better for canisters.
In conclusion, choosing the best aquarium canister filter for your tank is essential for maintaining optimal water quality and providing a healthy environment for your fish and other aquatic inhabitants. The Fluval FX Series, Fluval 407, Eheim Classic Series, Penn Plax Cascade Series, and Polar Aurora Canister Filters are all excellent options to consider as best aquarium canister filter, each offering unique features and benefits.
Remember to consider factors such as aquarium size, filtration capacity, livestock and bioload, noise level, ease of maintenance, brand reputation, and budget when making your decision. By carefully evaluating these criteria, you can find the perfect canister filter to meet your specific needs and ensure the well-being of your aquatic pets.
Investing in a high-quality canister filter is a long-term investment in the health and happiness of your aquarium. So don’t hesitate to choose the best canister filter for your aquarium and enjoy the benefits of clean and clear water for years to come.
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