The
What To Consider When Buying A Fish Tank Filter
One of the most important factors to consider when buying a
Size of Aquarium
The type and size of
Type of Fish
Fish of various species require various levels of filtration. Fish that produce more waste than others need more powerful filtration systems. Additionally, some fish require particular filtration techniques, such as those that need a particular pH level or water flow rates. For example, betta fish require filters with low flow rates. It’s crucial to learn about the filtration needs of the fish you intend to keep in your tank.
Filtration Needs
Mechanical, biological, and chemical filtration processes are the three main categories to take into account when choosing a
Canister Filters
Canister filters are external filters, in a cylindrical or rectangular container. These filters are efficient and effective in removing impurities because they can purify a high volume of water, quickly.
Pros and Cons of Canister Filters
Pros:
- Highly efficient mechanical and biological filtration, great for fish with high bioloads.
- Versatile and can be used in aquariums of various sizes and types, including both freshwater and saltwater tanks.
- Easy to customize with different types of
filter media to meet specific filtration needs. - Easy to hide from view.
- Easy to maintain, as the
filter media can be easily replaced or cleaned.
Cons:
- Expensive compared to other types of filters.
- Bulky and take up space below the aquarium.
- Difficult to install, requiring the use of hoses and fittings.
- Noisy if not properly maintained, as air bubbles can get trapped in the hoses and cause a humming sound.
- Require periodic maintenance to prevent clogging and ensure proper filtration, which can be time-consuming.
When to Choose a Canister Filter
Canister filters are ideal for those with large aquariums because they can handle a lot of water and effective filtration. Similarly, if your aquarium has a lot of fish in it, a canister
Top-Rated Canister Filters
The Marineland Magniflow is a canister filter with an easily removable lid, a quick-release valve block that immediately stops water flow and separates from the motor housing.
- Easy to set up and maintain
- Effective filtration
- Expensive
The built-in motor in the lid of the AMOSIJOY 172GPH external canister filter allows for extremely quiet operation, producing only up to 30db of noise while achieving effective water filtration.
- Quiet
- Adjustable water flow
- Large in size
The Aqueon QuietFlow filter offers multiple water return options for optimal versatility: a spray bar, a water director and a water polishing unit.
- Water polishing unit
- Customizable filtration media
- Bulky
Hang-On-Back Filters
A hang-on-back
Pros and Cons of Hang-On-Back Filters
Pros:
- Easy to install.
- Affordable.
- Compact.
- Easy to maintain.
- Provides mechanical, biological, and chemical filtration.
Cons:
- Limited aquarium size.
- Water flow can be too strong.
- Noisy, especially if not properly maintained.
- May require frequent cleaning.
- Visible in the aquarium.
When to Choose a Hang-On-Back Filter
Hang-on-back filters are generally best suited for small to medium-sized aquariums up to 75 gallons with a small number of fish or plants. They’re an excellent choice for beginners or those who prefer a simple, cost-effective, and easy-to-install filtration system.
Top-Rated Hang-On-Back Filters
The GRECH filter features 5W UV Sterilizer that helps eliminate algae and bacteria, keeping aquarium water crystal clear for 10 to 30 gallon tanks.
- Surface skimmer
- 5W sterilizer
- Large in size
The AMOSIJOY filter is completely sealed all around to prevent air leaks that could cause loud noises. This filter oxygenates the air with two water outlet functions: a duckbill outlet or a rain shower pipe.
- Affordable
- Quiet
- Bulky
The Cascade 300 Hang-On Filter quietly circulates water up to 300 gallons per hour (GPH). The Bio-Sponge cartridge optimizes the colonization of anaerobic bacteria.
- Bio-Falls system improves water oxygenation and helps with nitrate and ammonia removal
- Not flexible to varying water levels
Internal Filters
Internal filters fit inside the aquarium, completely submerged in the water and are frequently fastened to the glass with clips or suction cups.
Pros and Cons of Internal Filters
Pros:
- Easy to install.
- Cost-effective.
- Space-saving.
- Provides mechanical, biological, and chemical filtration.
Cons:
- Limited filtration capacity.
- May require frequent cleaning.
- Can be noisy.
- Water flow can be too strong.
When to Choose an Internal Filter
An internal
Because internal filters might not offer enough filtration capacity, however, they might not be appropriate for larger aquariums or aquariums with high biological loads.
Top-Rated Internal Filters
The Hygger 4-in-1 filter purifies, filters, circulates, and pumps water. It features an adjustable flow rate of up to 210GPH.
- Two water outlet options
- Quiet
- Difficult to clean
The Aqueon Internal Filter is compact, fully submersible and allows for vertical or horizontal placement, which makes it easy to hide behind aquarium decor. This filter has a flow rate of up to 55 GPH.
- BioGrid that effectively removes ammonia and nitrites
- Can be placed anywhere in the tank
- Unattractive
This internal filter contains cartridge floss that catches debris and fish waste, while its ultra-activated carbon removes odors and discoloration.
- Affordable
- Adjustable to changing water levels
- No biological filtration
Sponge Filters
Sponge filters
Pros and Cons of Sponge Filters
Pros:
- Gentle water flow.
- Mechanical and biological filtration.
- Easy to maintain.
- Cost-effective.
- Safe for fry and shrimp.
Cons:
- Limited filtration capacity.
- Not suitable for high bioloads.
- May need frequent cleaning.
- Not aesthetically pleasing.
When to Choose a Sponge Filter
Sponge filters are a fantastic option for smaller aquariums (up to 30 gallons) with moderate bioloads, delicate fish species, and space constraints. They work well in aquariums for shrimp or fry.
Top-Rated Sponge Filters
The ALEGI Sponge Filter is your most simple, standard sponge filter that provides biological and mechanical filtration.
- Tubing included
- Check valve included, to prevent water and air backflow
- No setup instructions provided
While most sponge filters don’t offer multi-stage filtration, Hygger’s Double Sponge Filter contains sponge filtration as well as bio ceramic media balls so tiny creatures can grow quickly.
- Ceramic media balls included
- Easy to assemble
- No tubing included
The Pawfly Sponge Filters are the cheapest on the market, and smallest in size, fit for 5-10 gallon tanks. They offer excellent aeration and filtration at a low price.
- Tiny otion available
- Affordable
- Basic
Power Filters
A power
Pros and Cons of Power Filters
Pros:
- Effective filtration.
- Customizable, with the ability to add additional
filter media or adjust the water flow rate. - Easy to use.
- Versatile, available in a variety of sizes and flow rates.
- Affordable.
Cons:
- Noisy.
- Take up space: require space behind the aquarium to hang the
filter . - Limited filtration capacity: may not be suitable for very large aquariums or aquariums with high bioloads.
- Require regular maintenance.
When to Choose the Power Filter
Power filters are a good option for small to medium-sized tanks because they’re best suited for aquariums up to 75 gallons. Due to their simplicity of use and upkeep, power filters are a great option for beginners.
Top-Rated Power Filters
The Penguin Power Filter features a bio-wheel that offers superior wet/dry biological filtration to nitrify bacteria and quickly remove toxic ammonia and nitrate.
- Easy to clean
- High GPH
- More expensive than other options
The Tetra Whisper is one of the quietest power filters on the market with a SoundShield that provides a barrier between the motor and filter to minimize noise.
- Quiet
- Easy to assemble
- Complementary filter media can cause clogs
The Aqueon QuietFlow features an LED filter cartridge change indicator light that flashes when debris clogs the cartridge, with a self-priming internal pump.
- Quiet
- Easy setup
- Can be too powerful
What Is the Best Type of Filter for a Fish Tank ?
The best type of
How Often Should You Change the Filter in a Fish Tank ?
You should clean your fish tank filter every 2-4 weeks, depending on the size of your aquarium, the type of
How Do You Clean a Fish Tank Filter ?
- Turn the
filter off and unplug it from the power source before cleaning it. - Remove the
filter media, including the mechanical, chemical, and biological media by opening thefilter . - Rinse the media in a bucket of aquarium water.
- Clean the
filter housing using a soft brush or sponge to get rid of any dirt or debris that may have accumulated. - Once the
filter housing and media have been cleaned, reassemble thefilter and place the media in the proper compartments. - Fill the
filter with aquarium water to completely fill thefilter . - Reconnect the
filter ‘s power cord and turn it on. - Check the water flow and adjust it as necessary.
👉 Check out our full guide to find out how often to clean your
Tips For Maintaining Your Fish Tank Filter
- Clean your
filter frequently to keep it working properly. - To ensure optimal filtration, change the mechanical, chemical, and biological media occassionally because it may lose efficiency due to clogging with debris over time.
- Check the water flow from your
filter frequently to make sure it is not too strong or too weak. The flow rate needs to be sufficient to keep the water moving without disturbing the fish or other aquatic animals housed in the tank. - Keep the
filter moist: If thefilter needs to be cleaned, make sure to keep thefilter media and housing moist to prevent killing the helpful bacteria that aid in waste breakdown and water quality maintenance. - Check for leaks: To make sure that water is not leaking from the
filter or returning into the tank, frequently look for leaks in the tubing orfilter .
How To Troubleshoot Common Fish Tank Filter Issues
Noisy Filters:
- Check the water level: If the tank’s water level is too low, the
filter may start to make noise. Verify that there’s enough water in the tank to cover thefilter intake. - Clean the impeller: The impeller can become clogged with dirt and debris and start to make noise.
- Check for air bubbles: make sure the
filter is properly sealed and check the tubing for any air leaks.
Leaking Filters:
- Verify for any damage or cracks in the
filter housing and replace if there is any damage. - Examine the O-rings: over time, the O-rings in the
filter can wear out and start to leak. If necessary, swap out the O-rings. - Examine the tubing: make sure the tubing is connected and tightened correctly. Leaks can result from loose connections.
Filters Not Working:
- Verify the power source to make sure the outlet is functional and that the
filter is plugged in correctly. To see if thefilter works, try plugging it into a different outlet. - Check the impeller: A dirty or clogged impeller can prevent the
filter from functioning. To clean the impeller and get rid of any dirt, remove it. - Inspect the
filter for air bubbles because they can prevent it from functioning. Make sure thefilter is properly sealed and check the tubing for any air leaks.
Which Filter is Best For You?
The best