Do Angelfish Need a Filter: Reasons, Facts, and Alternatives

Air quality in an aquarium is critical. To improve the air quality, aquariums rely on aquarium filters to remove particulate matter, waterborne toxins, and other pollutants from the water. Whether you’re a beginner or an experienced aquarist, it’s essential to know what types of filters are available and what they do.

A filter for an angelfish tank is essential because they require clean, fresh water to thrive. In addition, if an angelfish or any fish begins to show signs of illness, the addition of a filter will help remove these impurities and disease-causing bacteria to provide a healthy environment for the aquarium. 

What Filter Do Angelfish Need?

Different types of angelfish need different types of filtration. For example, an air-powered filter with a bio-wheel is ideal for most angelfish as it provides beneficial bacteria and aerates the water. In addition, it creates a nice balance of oxygen and water movement to keep the tank clean.

Canister Filter

If your angelfish tank is small, or you only have a few fish, then using a canister filter may be the best option. Canister filters use fin-type filters to remove particles and bacteria from the water. They are quiet and efficient and work well for smaller tanks.

Sponge Filters

You can use sponge filters in both large and small tanks. They are made up of a porous material, such as fiberglass or foam, that acts as a filter by trapping waste and particles. These filters need to be replaced about every six months, but they are great for larger tanks with a high volume of water.

Hang-on Back Filter

A hang-on back filter is a type of power filter that attaches to the aquarium wall. They use disks and grates to remove particles, bacteria, and waste from the water. A hang-on back filter is not as efficient as an air-powered or canister filter, but they are great for larger tanks with lots of fish.

What Is an Effective Filter Alternative?

An excellent way to filter the aquarium water with live plants is to place a type of air pump in the tank and attach it to a powerhead that you can turn on and off. This will create bubbles that will help remove specific bacteria, protozoa, and pollutants from your water.

Do Angelfish Live Longer With Water Filter?

Yes, angelfish will live longer and be healthier when they have a water filter. Filtered water contains fewer bacteria, which is good for the health of your fish. In addition, filtered water has more oxygen levels, which helps to keep fish healthy and happy. In addition, filtered water does not contain as much dirt as unpurified tap water and has a noticeable unpleasant odor.

Overall, Angelfish may look beautiful in any aquarium style, but when it comes to choosing your fish tank setting- whether picturesque underwater or bright and airy with lots of light- selecting the right filter is critical for all kinds of freshwater fish. In addition, keeping up on the regular maintenance will help ensure you have the best possible underwater experience with your aquatic pets.

Do Angelfish Need Oxygen?

Yes, Angelfish do need oxygen. They breathe through their skin, so if they don’t have enough oxygen, they will become stressed and may even die. An excellent way to provide more oxygen is to put air bubbles in the water or add an air pump that attaches to a powerhead.

Do Angelfish Like Strong Water Flow?

Most angelfish do not like strong water flow. They prefer a slower pace so their gills can rest and they won’t be agitated. If your aquarium has an aerator or waterfall, these filters will create too much velocity for most angelfish. In addition, large aquariums don’t often have enough water flow for angelfish as they need a lot of movement.

Do Angelfish Need Water Pumps?

Water pumps can help provide extra oxygenation, water circulation, and cleaning of the tank. However, they are not necessary for all Angelfish tanks, and they may not be required if you use a diffuser. Therefore, it is ultimately up to you to purchase a water pump for your aquarium.

Do Angelfish Need Air Bubbles?

Some angelfish do like air bubbles, but most do not. Angelfish breathe through their skin and will become stressed if they don’t have enough oxygen. Air bubbles can provide extra oxygen to your fish, though some find them visually pleasing so that they may keep them regardless of the benefits.

When Are Diffusers Necessary for Angelfish?

Diffusers provide a gentle stream of air bubbles that help oxygenate the water and increase the movement for angelfish. They also provide visual appeal, which some people find attractive in their aquariums. Angelfish do best when they have a lot of action, and air bubbles give that. Diffusers can help provide extra oxygen, clean the water, and increase the movement in your aquarium. They are not necessary all the time, but they can be very beneficial for angelfish if you choose to use them.

Warm Climates

If you live in a hot climate, it is vital to keep your angelfish cool. A way to do this is by adding ice cubes or placing a cold water filter on the bottom of their tank. This will help lower the temperature and reduce the stress levels of your fish.

Deep Aquariums

If you have a deep tank or a huge one, it may be challenging to keep your angelfish cool. To reduce the stress levels of your fish and help them survive in hot climates, try adding ice cubes or placing a cold water filter on the bottom of their tank.


Adding too many fish to an angelfish tank can be stressful for them. Try to keep the number of fish in your aquarium at a minimum and only add those compatible with one another.

Aesthetic Purpose

Another reason to keep your angelfish happy is that they can be pretty beautiful. Adding a diffuser will help improve the appearance of their tank and make it more pleasing to look at.

Can Diffusers Be Dangerous for Angelfish?

Diffusers can be pretty dangerous for angelfish if they are not used correctly. For example, if the diffuser is placed too close to the fish, it can create a high level of water noise.

How to Make Your Angelfish Are Properly Oxygenated?

If your angelfish are not receiving enough oxygen, they may start to develop illnesses. To ensure that your angelfish are getting the proper amount of oxygen and avoid any sickness, make sure that their tank has a good filter and regularly check the water level. Additionally, add aquatic plants or floating plants to increase oxygen levels in your tank.