What is an Internal Filter?
An Internal fish tank filter is a fully submersible filter that is placed inside your fish tank.
Unlike external filters that need to be kept in cabinets or hang on the back of your fish tank. Internal filters are placed inside your aquarium allowing you to place your aquarium up against a wall.
Internal filters are great for smaller fish tanks but can also help with dead spots in larger tanks.
Or, they can be used to help with additional filtering due to a higher bio-load.
These filters are very easy to set up, small and very quiet, they provide excellent filtration while being easy on your wallet.
Here are the best internal fish tank filters for the price.
|MODEL||FILTER||TYPE||GALLONS PER HOUR||TANK SIZE||RATING||PRICE|
|Tetra Whisper In-Tank Filter 20i||Internal Power Filter||100 gph||Up to 20 gallons||3.7||$|
|Elite Underwater Mini Filter||Internal Power Filter||15 gph||Up to 3 gallons||3.8||$|
|Tetra Whisper In-Tank Filter 3i||Internal Power Filter||N/A||1- 3 gallons||3.5||$|
|Tetra Whisper In-Tank Filter 10i||Internal Power Filter||50 gph||Up to 10 gallons||4.5||$$|
|KollerCraft TOM Aquarium Mini Internal Filter||Internal Power Filter||45 gph||Up to 10 gallons||4.0||$|
|Penn Plax Cascade 600 Internal Filter||Internal Power Filter||175 gph||Up to 45 gallons||4.3||$$|
|Fluval Underwater Filter||Internal Power Filter||60 gph||Up to 15 gallons||4.0||$$$|
|Aqueon QuietFlow Internal Filter - Small||Internal Power Filter||66 gph||Up to 15 gallons||4.5||$|
When it comes to picking the best internal filter for a tropical fish tank we would advise you to consider the following pros and cons with internal filters.
Internal Filter – Pros
- Easy to install
- Low maintenance
Internal Filter – Cons
- Performs best on tanks smaller than 20 gallons.
- Smaller Filter Volume
How to set up an internal fish tank filter
- Find a spot in your fish tank that will make it easy to hide the filter and tubing. Placing the filter in a corner is usually the best option.
- Make sure you have the correct filter media cartridges for your filter and insert the media into your internal In most cases your filter will come with a few media cartridges ready for set up.
Note: If you are unsure what filter media you require, find the model number for your filter either on the back of the filter or on the box and purchase media used with your model.
As an example:
If you’re really unsure, here’s a simple trick:
Go to Amazon and enter your filter model in the search bar.
Click on your filter in the search results and you will be taken to a page that looks like the image below.
In the image above you will see we are looking at the Cascade 600 Internal Filter.
If you look to the bottom “Left” of the image there is a section called “frequently bought together”.
Amazon is showing you the exact filter media needed for this exact filter.
- Most internal filters will come with suction cups to press against the glass. Place your filter into the fish tank and ensure it is attached to the glass.
- Make sure the entire filter is covered with water and plug it in. The filter will start to suck water into the canister.