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Finding Your Mini Aquarium Filter

As a betta owner, one thing I noticed was how difficult it was to find a great filter for a small tank.

This is a big problem because in my opinion, a betta tank should always have a way to filter the water, no matter how small the tank is.

However, I would recommend never keeping a betta in anything smaller than a 2.5-gallon tank.

I was surprised how little information there is online about mini filters for small tanks.

So, I thought it would be a good idea to provide some information to help out new betta owners, experienced betta owners and anyone who may be keeping any type of fish in a small or nano-sized aquarium.

Rio Mini 50 Internal Power Filter for Aquarium
  • Easy installation
  • Energy efficient
  • Fully submerible
  • Quiet operation

Prices pulled from the Amazon Product Advertising API on:

Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on [relevant Amazon Site(s), as applicable] at the time of purchase will apply to the purchase of this product.

A quick summary of why I like the Rio Mini 90 Internal Power Filter is that:

  • Small design Internal filter, takes up a little space inside the tank.
  • Adjustable output, multiple water discharge options, and customization possible
  • Various adapters included, to adjust direction of the water output.
  • Choice of different filter media.
  • Add different medias (sold separately) as long as you have nylon media bags (sold separately)
  • Can be positioned vertically or horizontally
  • Inexpensive

Mini Aquarium Filter Considerations

If you are looking for a mini tank filter for your betta or small fish tank here are few things you should consider:

  • Filter Capacity & Flow Rate
  • Type of filtration (media)
  • Value

The filter I use which I think is a good mini fish tank filter is the Rio Mini 90 Internal Power Filter and I have a full review of it here: Rio Mini Internal Power Filter.

However, there are a lot of other mini betta fish filter options available. Below you will find 5 mini fish filter models along with the aquarium capacity for each mini filter.

Click here to see our list of the best internal aquarium filters.

3 More Mini Aquarium Filter Options For Your Betta Fish

Prices and images pulled from the Amazon Product Advertising API on:

If you are unsure about whether or not you really need a filter for your betta please read our post about Betta Fish And Filters.

In it we provide options for the best betta filter (note they are not mini filters) as well as why you should always have a filter in your betta tank. 

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The Ultimate Betta Resource Guide. Click here to download now!