does fish tank need filter

Does Fish Tank Need Filter – What If You Can’t Afford One?

Fish tanks are a great addition to any home. They’re often quite beautiful and can really bring a room together. Everyone knows that fish need water, but do you know what else a fish tank needs?

Does fish tank need filter? It’s a common question asked among novice and experienced fish keepers. In this article, I will try to answer this question and I hope at the end of it you would be able to make your decision. So let’s get started.

Does Fish Tank Need Filter?

There’s this myth that having a fish tank filter is absolutely necessary for keeping your fish healthy and alive. And I understand why people think this. In fact, I used to be one of those people. After all, we are told in the fish store that a filter is “absolutely necessary” to keep the tank clean and the fish healthy.

But here’s the thing, filters aren’t necessarily needed to keep your fish alive. If you’re talking about a betta, goldfish, or other small fish, they can survive just fine without a filter. In fact, many breeders of these types of fish actually keep them in unfiltered tanks because they don’t require heavy filtration as larger species do. Betta and goldfish owners often set up their tanks without filters knowing the fish will be just fine.

If you still have any doubts about whether you need a filter in your betta or goldfish tank, let me put it this way, there are many things you could add to your aquarium that aren’t “necessary” but which improve your fish’s living conditions.

You could add live plants or rocks to make the tank more attractive and natural, or you could add aquarium salt to relieve stress and skin irritations. If a betta doesn’t have enough room in his water to swim around and explore, he’ll get bored and start showing signs of stress.

The same goes for a filter. it isn’t absolutely necessary, but it will greatly improve the life of your fish. As I mentioned before, fish waste is toxic to them and needs to be cleaned out regularly.

Why Does a Fish Tank Need a Filter?

A filter will help keep the water clean in between water changes by preventing ammonia from building up. If you don’t want to use an air pump, you’ll need to change the water much more frequently, daily if possible, to prevent the ammonia from getting so high that it harms your fish.

Without a filter, waste will build upon the gravel bed anyway, so all those benefits I mentioned before will go out the window. All you’ll be left with is an expensive piece of equipment that takes up space.

Can Fish Survive Without a Water Filter?

fish tank filter

Can fish survive without a water filter? Yes, they can, but the question you should be asking is whether they can thrive without one?

Fish are fairly hardy creatures within a normal range of environmental conditions. They can survive, but their health and well-being will be compromised without the filter. So it is recommended to have a water filter in your fish tank.

How Long Can a Fish Go Without a Filter?

The filter of your aquarium can be thought of as its heart and lungs, which means that an aquarium without one is going to be in bad shape.

The good news is that it can usually survive for a few weeks without its filter, but it all depends on the number of fish and their size. The larger the fish faster the water quality will go down.

Do You Have To Clean A Fish Tank If It Has A Filter?

Many people wonder whether or not they need to clean the fish tank that has an air pump installed in it. The simple answer to this question is yes, you do.

While filters are designed to remove debris and fish waste from the aquarium, they do not remove everything perfectly. If you don’t clean your acrylic glass tank regularly, the water quality will suffer and may become toxic for your fish (and any other animals).

What Are the Most Popular Types of Filters?

There are several types of filters available in the market, and choosing the right one can be difficult. Here are some of the most common types of fish tank filters, along with their benefits:

1- Power Filter

One of the most popular types of aquarium filters is the power filter. It is a perfect choice for smaller tanks, as it’s built into the hood of an aquarium and hangs on the back. It filters water by pumping it through a sponge-like material that catches all the particles that have settled at the bottom of your aquarium.

2- Undergravel Filter

Undergravel filters provide excellent filtration to larger tanks and they’re relatively inexpensive. The undergravel filter consists of a layer of gravel with tubes that run underneath it in a crisscross pattern. Water is drawn down through these tubes, which then forces dirt and debris into the gravel bed where beneficial bacteria break down ammonia and nitrites into less-harmful nitrates.

3- Canister Filter

Canister filters are large units that sit outside of your tank and work by pumping water into a pressurized chamber. As the water passes through the chamber, it’s cleaned, aerated, and heated before it returns to your aquarium or pond. These are good all-around filters that can handle large amounts of water at high flow rates so they’re ideal for large aquariums.

Does Fish Tank Filter Need To Be On All Time?

fish tank filter

Not necessarily. With certain types of filtration systems, you can turn off the air pump at night when water agitation is unnecessary. This will help keep algae growth under control by preventing it from being able to spread its spores around the tank.

However, some filters must run 24/7 to ensure proper water quality and stability. For example, under gravel filters that depend on a powerhead for aeration should always be kept running since the powerhead needs continuous circulation in order for it to remain effective (and not die).

Other types include mechanical media like sponges which need constant flow through them so they can trap particles before they sink into sediments below where beneficial bacteria live (and thus become harder for beneficial bacteria to digest).

If you have a small tank with few fish, then turning off your filter overnight may not cause any problems.

How Often Does a Fish Tank Filter Need To Be Changed?

It’s important that you change your filter every eight weeks, or more frequently if the tank is heavily populated. While you can occasionally miss a week or two, it’s important to stay on a regular schedule so that your fish are always getting the best water and the environment stays safe from toxins.

Does My Fish Tank Filter Need To Make Bubbles?

fish tank filter bubbles

Many people are under the impression that it is necessary for Fish Tank Filter To Make Bubbles in an aquarium. However, this isn’t necessarily the case. As long as the filter is doing its job (removing debris and waste from the water), you don’t need to worry about bubbles.

In fact, too many bubbles can actually be a bad thing. If you see too many bubbles forming, it could mean there is too much oxygen in your tank and they need to be removed via a degasser. This will stop them from building up and help make your tank more stable.

Should You Clean Your Fish Tank Filter?

Yes, you should, if you don’t clean your filter regularly, it will get clogged up with all the stuff it has removed from the aquarium water. This means that it won’t be able to do its job properly (or at all), which will make things worse for your poor fish!

If you want healthy fish and happy home, then you need to keep up with the maintenance of both your tank and its contents. Otherwise, things could start smelling bad very quickly!

Does Goldfish Need A Filter?

A goldfish can survive without a filter, but it is not advisable. A goldfish will be healthier and happier when living in a filtered fish tank. A filter is essential because it circulates water, removes waste, and keeps the water clean.

Goldfish produce a significant amount of waste. They are messy eaters, and they also excrete waste through their gills and skin. This waste contains ammonia, which is toxic to goldfish. If the ammonia isn’t removed from the water, then your goldfish will get sick or die.

In an unfiltered fish tank, the ammonia will build up until the water becomes toxic to your goldfish. Even if you do 100% water changes every day, there won’t be any way to remove all of the ammonia from the water. However, a filter can help keep the ammonia levels below toxic levels by absorbing it before it reaches that point.

Does A Betta Fish Need A Filter?

Betas can survive just fine without a filter. But that doesn’t mean you should just leave them in their bowl with no aquarium filter. Bettas are tropical fish and need special care to thrive and live long lives. Just because they can survive doesn’t mean you should neglect them by not cleaning their tank regularly or doing anything else that might cause harm over time.


A fish tank is a beautiful thing, and it’s even more beautiful when the fish inside of it are healthy and happy. But if you think the filter is just there to make your tank look pretty, you’re wrong. In fact, the filter might be one of the most important parts of your tank. Without it, your fish would get sick and die. 

Never underestimate the importance of a filter in a fish tank. Please let us know in the comment what you think of fish tank filters.