The 40 Gallon Breeder Tank Dimensions

A breeder-style tank is ideal for those looking to breed different types of fish in their home aquarium. It provides a suitable environment for fish to reproduce while providing ample room for the inhabitants to grow.

A 40-gallon breeder tank is a popular choice for fish enthusiasts looking to house larger species of fish or create more elaborate aquascapes. This tank is an effective way to create a larger habitat for your fish, as it has a larger width and depth than the standard aquarium. So, what are the 40-gallon breeder tank dimensions?

40 Gallon Breeder Tank Dimensions:

A 40-gallon breeder tank measures 36 inches in length, 18 inches in width, and 15 inches in height. This particular size of tank can hold a total of 42 gallons of water. The measurements of the tank refer solely to the glass and do not factor in any additional add-ons such as a plastic trim, canopy, or equipment.

fishing aquarium

The 16-inch dimensions of this tank make it uniquely suitable for fish breeding, as well as providing easier access for you to reach into the tank. 

When purchasing a 40-gallon breeder tank, it is critical to take into consideration the size and placement of its accompanying cabinet or stand. It is important to make sure that the stand or cabinet is of suitable size and to plan out an appropriate space for it in your home.

Other Sizes of 40 Gallon Tanks

The 40-gallon aquarium also comes in other sizes. Aside from the breeder-style tank which measures 36″ x 18″ x 15″.

The long 40-gallon aquarium is an ideal choice for those who want to make the most of their aquatic space. Its dimensions of 48 inches by 12 inches by 16 inches provide 40 gallons of room for fish, plants, and other aquarium decorations. This aquarium style is ideal for larger species and allows for more expansive displays.

 If you’re looking for a custom 40-gallon aquarium, you don’t have to stick to the standard dimensions. Instead, you can opt for a design that consists of multiple dimensions, as long as they all equal a total of 40 gallons. This means more creative freedom and the ability to create a unique and visually appealing aquarium.

What Is The Weight of a 40-gallon Breeder Fish Tank?

The weight of a 40-gallon breeder fish tank can vary depending on the material it is made of and its specific dimensions, but on average, a 40-gallon breeder fish tank weighs around 55-60 pounds when empty and can go up to 400 pounds when filled with water, substrate, decorations, and the inhabitants.

The weight of a gallon of water is 8.33 pounds, while a gallon of saltwater weighs 8.5 pounds.

Keep in mind that the weight of the tank increases significantly when it is filled with water, so make sure that the surface it will be placed on can support the weight of the tank and its contents.

The weight of any additional items such as aquarium equipment or tank decorations is not included in these numbers that you may add to your setup.

40-Gallon Breeder Tanks: Uses and Benefits

A 40-gallon breeder tank can be used for a variety of purposes, including:

  1. Keeping fish: A 40-gallon breeder tank is a great option for keeping a variety of fish species, such as cichlids, tetras, and livebearers. It provides ample space for the fish to swim and also allows for a larger number of fish to be kept in the tank.
  2. Reptile and amphibian housing: It can also be used to house reptiles and amphibians, such as snakes, lizards, and frogs. Reptiles can move around easily in this environment and you can also set up a heat lamp and UVB light to provide the necessary heat and light for their survival.
  3. Plant propagation: You can also use these tanks as a propagation tank for aquatic plants. Large space to grow and maintain aquatic plants.
  4. Quarantine tank: These tanks can also be used as quarantine tank for new fish or invertebrates before introducing them to the main tank, this is to prevent the spread of diseases from new fish to the existing population.
  5. Breeding: As the name suggests, a 40-gallon breeder tank is perfect for breeding fish, as it provides enough space for the adults to move around and for the fry to grow.

Is It Possible To Place a 40-Gallon Breeder Tank On a Table?

Yes, you can put a 40-gallon breeder tank on a table, but it is not a recommended practice, you will need to make sure that the table is sturdy enough to support the weight of the tank and its contents.

Reinforcing a table is essential in order to ensure that it can safely support the weight of whatever is placed upon it. Failing to do so could cause irreparable damage, as well as cost a significant amount of money in repairs or replacements.

If an aquarium stand is not available to you, customizing one or buying a used stand from another hobbyist may be an option. Building or purchasing a second-hand stand can make the task of setting up and maintaining your aquarium much easier.


So as I have mentioned above the dimensions are 36 inches in length, 18 inches in width, and 15 inches in height of a breeder tank and the dimensions of other 40 gallons tanks. You can get a good idea about it. However, if you have any queries or suggestions, you can ask in the comments below.

Leave a Comment