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The Right Betta Fish Tank Size

So you want a betta fish?

Below is an awesome infographic that gives you some information on what a betta fish needs to be happy.

One of the items noted in the infographic is a Filter.

Some people don’t believe you need a filter for a Betta Fish – So we wrote an entire post on the subject that might change your opinion. Check out Do Betta Fish Need A Filter?

New To Betta Fish? Check out our guide How To Care For a Betta Fish For Beginners for some great step by step tips.

Top 4 Most Popular Betta Fish Tank Ideas

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

Our #1 Pick For A Betta Tank – The Marineland Portrait Kit

The Marineland Portrait Aquarium is one of those kits that come with (almost) everything you need. You can’t blame them for almost being perfect.

This tank is the perfect size for your Betta and other small fish. Its unique and stunning design has captured the hearts of many Betta lovers.

It has awesome moonlight and daylight LED settings that give it an edge over other small aquarium kits. With this feature, you get to choose between a bright white light during the day and soothing blue light at night.

You can also add a timer for the ultimate hands-off experience.

Betta Fish Tank Size Requirements [Infographic]

Below you will find a great infographic to give you a great overview of the requirements and supplies needed to set up a great Betta tank successfully.

Betta Fish Tank Setup - Betta Care Infograph

Betta Fish Tank Setup

Selecting Your Betta Fish Tank Size

It is a common belief that betta fish can live in an aquarium as small as a cup.

Now, it may be true that they can “survive” in a tiny cup, but is it the best environment for your betta fish?

Not at all.

But how many gallons does a betta need? Keep reading, and we’ll let you know in the next section.

How Big Should A Betta Tank Be?

The recommended minimum tank size for Betta Fish should be at least  2.5 gallons or larger. A 5 gallon is likely the best size tank for Betta Fish.


The smaller the tank, the more difficult it becomes to maintain a clean environment free of ammonia and toxins.

Small tank results in less room for error as toxins can build up much faster than a larger aquarium. A small aquarium also requires more frequent water changes and tank cycling.

The betta fish natural environment is tropical, and they do best in aquariums that mimic this environment.

This can be accomplished by having plants (real or fake) and have your aquarium heated and filtered just like any other tropical fish.

Do Betta fish like big or small tanks?

Betta fish like to swim, and the larger the tank, the better. The smallest tank size for Betta Fish would be 2.5 gallons.

Can I put a Betta fish in a 10-gallon tank?

Of course, you can! In fact, this is a great size for your Betta as it will allow you to start to incorporate a few tank mates for your Betta fish.

Video: What Is The Right Size For A Betta Tank?

Equipment List For The Best Betta Tank Setup

When you’re setting up a Betta tank, we recommend the following equipment:

This list is just a starting point, and any large aquarium can be used.

The smallest Betta tank I use is 2.5 gallons, and the perfect tank size would be 5 gallons like this starter kit from Marineland, shown below, which comes with pretty much everything you need.

Suppose you’re into gardening and looking for cool Betta fish tanks, which will be the focus of any room. Then you should read our post about Betta fish and aquaponics.

Click here to see 7 Awesome Betta Fish Aquaponics Kits For Your Home.

Always add a Stress Coat when setting up a new aquarium.

Stress Coat removes chlorine, chloramines, and heavy metals to make tap water safe for fish.

It Contains Aloe Vera, which promotes healing and regeneration of damaged fish tissue and forms a synthetic slime coat to help prevent electrolyte loss.

Stress Coat is proven to reduce fish stress, which can occur from setting up a new aquarium when performing monthly water changes, poor water quality, and handling fish.

High-stress levels can cause poor health and a weakened immune system, making your fish more susceptible to disease.

Performing 20% monthly water changes with a gravel vacuum will keep your aquarium looking great and your fish healthy.

If you would like to read more about maintaining your aquarium, sign up for our 9 tools to buy for cleaning your aquarium, which will show you step-by-step how to clean your aquarium.

It is best not to overcrowd your aquarium by adding too many fish too quickly. Go slowly, start by adding 2 fish and wait 10 days before you add another two.

It is recommended to go with 2.5 cm of fish per 3.7 liters of water. Remember, your fish will grow as they mature.

Betta’s can also be placed into some community aquariums. Decorate your aquarium as you like and try to include some hiding places for your fish to rest.

When it comes to feeding your betta fish, an excellent article on the subject:

Click here to read What Do Betta Fish Eat?

Betta Fish Myths

1. Betta’s are not killers and can do well in friendly community aquariums.

2. Though betta fish can survive in shallow puddles in the wild during the dry season. It is not their optimal environment. Their natural environment is the large waters of Thailand full of plants and vegetation.

3. True, betta fish can go up for air. However, this is mainly to survive in an oxygen-deprived environment. They are fish, just like any other, and breathe through the water. So if you need some extra oxygen get an Air Pump for your fish tank to help agitate the surface water.

2020-12-19T16:05:46-07:00October 13th, 2020|Betta Fish Care|Comments Off on Updated! Best Betta Fish Tank Size For A Happy Betta Fish [Guide]