Best Filter for Goldfish

If you have a goldfish pet, you’ll want to ensure you’ve created a safe and comfortable environment in which to keep it.

This means that your fish tank has to be in top-notch condition and has to have all the necessary functions and features so that it is not only suitable but a great home for your fishy friend.

One of the most important things, when taking care of a fish, is to keep the water clean, so that no unwanted bacteria build up from the dirt and waste. One way is to change the water yourself on a regular basis, but this can be quite a big hassle.

The other way, which is far smarter and efficient, is to have a water filter in your tank.

If the water becomes stagnant and dirty, it creates a damaging environment that can make your goldfish ill. It’s much better to prevent this by keeping the water moving and clean, and a filter is affordable and simple to install.

A filter is necessary if you truly want your fish to live a healthy life, and it will save you a lot of time and effort in the long run. There are many available options in the markets, with a wide range of types of filters, with different features and functions.

It can be a bit overwhelming to try and figure out which product is the best possible choice for your needs and your tank. To make things a little easier, we’ve compiled a list with our top five picks for the overall best filters for goldfish, and you can pick the one most suited to you!


The Aqua Clear Fish Tank Filter is a best selling and extremely popular choice, with an overwhelming number of positive reviews and ratings from its many satisfied customers.

It’s one of the easiest and most efficient filters to use, powerful and versatile. It is suitable for tanks of a size between 5 and 70 gallons of water.

Although it’s small in size, it has seven times the power and capacity of other comparable products, making it one of the most efficient. It also has a highly energy-efficient pump that lowers the costs of its operating times, making it an ideal option.

It provides optimal mechanical, chemical, and biological filtration for your tank. It also features Aqua-Clear Foam, Activated Carbon Filter, BioMax, and a Cycle Guard, all for even better water quality.

This filter also comes with a patented Re-filtration System that allows you to control the flow rate.

Although all the bonus filters make this product all the more efficient and help provide an ideal environment for your goldfish, they do need replacing on a monthly average, but it is far better than having to manually change the water yourself every week!


  • Highly popular and recommended product
  • Suitable for tanks between 5 and 70 gallons
  • 7 times more powerful and capable than other filters
  • Energy-efficient and excellent filtration
  • Features different bonus filters to improve water quality and tank environment
  • Patented Re-filtration system


  • Requires regular maintenance


MarineLand is an extremely reliable and high-quality brand, with over 40 years of experience and upholding the position of leader in innovative aquatic environments and equipment.

Highly reliable and advanced, with efficient products that are recommended by professionals for the best results in water filtration. The Penguin 200 BIO-Wheel Power Filter is suitable for fish tanks of a size between 20 and 70 gallons.

It has been engineered to provide a three-stage filtration with excellent mechanical, biological, and chemical results, maintaining an ideal environment for your goldfish. It comes with a patented Bio-Wheel technology, which uses a rotating wheel to provide both wet and dry biological filtration.

As for additional features, it has a two-piece vented cover for convenient access to the filter cartridges, and an adjustable mid-level intake for improved water circulation.

The MarineLand Penguin is also super convenient as it is very easy to install and maintain, with no special setup needed.

You just need to place it into the tank appropriately, following the manual instructions, and it is ready to go!


  • Reliable, well known, and leading brand in innovation
  • Suitable for tanks between 20 and 70 gallons
  • 3 stage filtration system for excellent results
  • Patented Bio-Wheel technology
  • Additional filters to improve water circulation and convenience


  • Not very quiet


If you’re looking for a simple and extremely cost-efficient filter for your tank, then the Marina power Filter might be just what you need.

It is suitable for tanks of up to 20 gallons in size, which is more than able to house a goldfish or two! The compact and slim design makes it highly practical and convenient for placing in your tank, looking elegant and sleek.

It also takes up a lot less space! It comes with four filtering cartridges and an effective multi-step filtration system. It comes equipped with adjustable flow control, so you can customize the water flow rate and set it to your goldfish’s needs.

As the motor is submerged underwater, it’s very quiet when it’s running, so you won’t even notice the filter there! The installation and setup process is very easy, as you just have to place it in the tank and plug it in for it to start running.

It also requires minimal maintenance, so it really is a convenient filter. Simple, but highly efficient and stress-free!


  • Extremely cost-efficient
  • Suitable for tanks of up to 20 gallons
  • Compact and slim design - doesn’t take up much space
  • 4 filtering cartridges and multi-step filtration
  • Adjustable flow control


  • Not as powerful as other filters


Tetra is a trustworthy and favored brand amongst customers, known for its range of aquarium supplied that reach great standards of high quality.

The Whisper WX30 Power Filter is suitable for fish tanks of a size between 20 and 30 gallons. As the name suggests, it provides a whisper-quiet filtration system, with multiple steps to get the water to a high level of cleanliness.

It’s a simple yet highly effective design, and it maximizes the oxygenation of the water by keeping up a constant flow. This continuous agitation of the water also helps prevent the build-up of debris in the water, therefore promoting a healthier water environment for your goldfish.

The Tetra Whisper also comes equipped with TimeStrip technology, which lets you know when the carbon filter needs to be changed. That way, you don’t have to be constantly checking!

During its multi-step filtration, it uses a bio scrubber to remove ammonia and nitrate from the water, which is toxic and dangerous to fish, so you ensure that your goldfish can remain healthy and safe. 


  • Suitable for tanks between 20 and 30 gallons
  • Whisper-quiet, multi-step filtration
  • Maximizes oxygenation through continuous water flow
  • TimeStrip technology
  • Bio Scrubber to remove ammonia and nitrate


  • No additional filters can be added to it


With MarineLand being such a leading and high-quality brand, it is no wonder we’ve decided to include another product of theirs on this list.

The Magnum Polishing Internal Canister filter is highly capable, suitable for fish tanks of up to 97 gallons, which is far bigger than the average. It’s very easy to use, and arrives ready for installation, with a motor that submerges underwater for an immediate startup.

It has a versatile filtration system, with two refillable chambers that can house a customizable filter media. One of them already comes with a pre-installed carbon filter.

It provides a three-stage filtration and a highly-efficient water polishing function. Overall, it’s a simple and powerful filter, with highly efficient features and low maintenance required.


  • Suitable for tanks of up to 97 gallons
  • Simple and highly-efficient
  • Versatile - three-stage filtration system and water polishing function
  • Two refillable chambers for filters
  • Easy to install, instant setup


  • Hard to switch between functions

Best Filter for Goldfish Buying Guide

Having a suitable filtration system in your fish tank can be the difference between your goldfish thriving in a healthy and safe environment, or barely surviving in an ill-fitted quality of life.

A filtration system is also an extremely useful and efficient form of maintaining the quality levels of your tank’s water and avoids you having to manually change the water regularly.

It can also add plenty of beneficial bonuses to increase the quality and health of the water, making it an even better environment for your goldfish to live in. However, finding the right filter can be somewhat of a struggle, especially with all the available options in today’s market.

It’s important to understand the basic features needed so that you can consider all the important factors when purchasing your filter. 

Size of the tank:

The first thing you need to look at is whether the filter will be capable of efficiently filtering the water in your goldfish tank, according to the size it is able to operate in.

For this, you need to know how many gallons of water your tank holds, so you can look for a suitable filter. 

Water flow rate:

The water flow rate of a tank filter is the space at which the water gets cleaned, and it can directly affect the fish’s comfort. If the flow is too fast, it might unstable the biorhythm and will disturb the goldfish. If it’s too slow, dirt might start to build up and the water quality will decrease. 

Some filters might have adjustable flow rates so that you can set it to the most comfortable pace for your goldfish. Others might have a special continuous flow that allows for better oxygenation of the water. It’s up to the specific needs of your fish!

Filtration technology:

The most important feature to consider when buying a filter for your goldfish is how effective the filtration actually is, and how clean the water is as a result. A lot of filters have a multiple-step system for enhanced results.

You should aim to be provided with the most optimal mechanical, chemical, and biological forms of filtration, and they can be achieved through different technologies and methods. Always check the product descriptions for more information!

Frequently Asked Questions

Can a goldfish live without a filter?

Technically, a goldfish can live without a filter. However, it will not be the optimal life, as it won’t be the most healthy, comfortable, or safe environment for the goldfish to inhabit.

Not using a filter will likely shorten your goldfish’s life, and will have a higher chance of causing illness and health problems. If you want your goldfish to live a good and healthy life, you will need a filter to ensure it has a suitable environment.