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Topfin Filter Not Working?

Top Fin Aquarium Filter Not Working

If you’re a fish parent who has a Top Fin aquarium then you’re probably well aware that your aquarium has a filter. The filter works to keep the water clean and healthy for your fish. These filters, however, can sometimes give us problems like suddenly stopping working. If this has happened to you, you’re probably wondering “why is my Top Fin power filter not working”?

There are a few reasons why your Top Fin aquarium filter is not working. These reasons include problems with the power supply, impeller and water flow issues, and clogged filters. 

Since filters are a vital part of keeping a healthy aquarium, you might be worried about your filter not working. While it is definitely a cause for concern, fixing your filter and getting it to work again is usually pretty easy. In this article, we’ll discuss the reasons why your filter isn’t working as well as the solutions to get it back in working order. 


Top Fin Silenstream PF-L Refill for PF20, PF30, PF40 and PF75 Power Filters 6.5in x 4.5- (3 Count)
Top Fin Silenstream PF-L Refill for PF20, PF30, PF40 and PF75 Power Filters 6.5in x 4.5- (3 Count)
Intended For Top Fin Silenstream Power Filters 20, 30, 40, 75; Product Dimensions: 6.5 in L x 4.5 in W

Reasons Why Your Top Fin Aquarium Filter is Not Working

If you notice that your Top Fin aquarium filter isn’t working as efficiently and effectively as it should, or if you’ve noticed that it has stopped working altogether, there are a few common problems that may be the reason why. 

Clogged Filters

If you notice that your filter isn’t working as properly as it should, is making noises, or has stopped working completely, then it may be due to a clogged filter. This is the most common reason why an aquarium filter quits working. 

Clogging generally happens when a filter has not been cleaned as often as it should be. However, having a filter that is too small for your fish tank can also cause it to become clogged easily. This is due to the filter filling up with wastage faster since it has to filter more with a shorter capacity. 

In order to prevent these issues from occurring, you’ll want to make sure to have an appropriately sized filter, one that is made for the size of aquarium you have. Also, you’ll want to ensure that you clean or replace the filter regularly. It is recommended to replace the filter cartridge every three weeks and clean the filter once a month.

How Do You Unclog a Top Fin Filter?

The best way to unclog a Top Fin filter is to clean it. In order to clean the filter, you will want to use either room temperature water or two cups of aquarium water. Never use cold tap water as this can be damaging to the beneficial bacteria that your aquarium needs. 

To begin cleaning your filter, you’ll want to unplug the filter first. Once it is unplugged, remove the filter from the aquarium. Next, disassemble the filter.

Using room temperature water or water from the aquarium, add in a water conditioner and begin cleaning the filter media with the conditioned water. The media should not be cleaned thoroughly because you will want to leave some bacteria behind. This is beneficial to the health of your aquarium. Avoid using brushes or sponges to clean the media. 

Once you have cleaned the media, move on to cleaning the rest of the filter. Scrub it with a brush or sponge and rinse it to remove all the algae and debris. This can be done with warm water. Avoid using hot water. 

With everything nice and clean, reassemble the filter and place it back into the aquarium. Plug it back in to check if it works or not. If your filter still doesn’t work, it may be time to replace it instead. 

How Do You Replace a Top Fin Filter?

Replacing a Top Fin filter means replacing the cartridge.

To do this, you’ll first want to ensure that the filter is turned off and then unplug it. Remove the filter’s lid. Take out the old cartridge and dispose of it. 

Take the new filter cartridge and rinse it with cold water to remove any dust particles. Place the new filter cartridge into the filter slot then add a small bucket of water into the filter. 

Put the lid back on, ensuring that it is secure, and plug the filter back in.

Power Supply Issues 

Power supply issues can come in the form of an unsuitable plug-in, insufficient power supply, or power surge issues. Your filter may not be plugged into the outlet properly or the outlet may have an internal issue resulting from a power surge. 

To test whether or not you’re facing a power supply issue, check the connectors or try plugging your filter into another outlet. 

Problems with the Impeller 

The impeller is a vital component to keeping your filter working. It helps with water flow and suction. If your filter is no longer working and you have checked the filter and power supply issues with no luck, it may be due to the impeller being broken, loose, or blocked by waste.

Be sure to check the impeller and either clean or replace it if necessary. If you notice any damage to the impeller, it is best to replace it, even if the damage is small. 

Improper Water Flow 

Improper water flow is often the result of an incorrect size and capacity of the filter in your aquarium. To prevent a water flow issue, ensure that your filter is the correct size and capacity for your specific tank. 

Why is My Fish Tank Filter Not Blowing Bubbles?

There are a few reasons why your filter may not be bubbling. First, it may be because of a dirty or clogged filter, so be sure to check your filter first and clean it if needed. 

Another reason is that the air pump may have been unplugged, loosened, or blocked, or that the membrane may no longer be in working condition, so be sure to check the pump out as well. 

A faulty air pump is detrimental to your aquarium and can cause your filter to no longer bubble. These faults can be caused by broken rubber bladders, kinks in the tubing, and incorrect placement of the pump. Make sure to check all of these aspects to ensure that the air pump is working effectively. 


There are several reasons why your Top Fin filter may not be working and several solutions to get it to work again. Worst case scenario is that you’ll need to replace the filter, which should be done occasionally regardless; otherwise cleaning the filter, making sure there’s an adequate power supply, and ensuring that the impeller is working should do the trick of fixing your filter issues.

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Erik Miller

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Hello, there. Welcome to my blog. I am Erik and I’m the main editor of Sealife Planet website.

My passion and hobby has always been scuba diving. My mission is to grow this website and help others with useful information about the sea world. Enjoy! is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to

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