Complete Guide to Flowerhorn Tank Size

In this post you’ll learn everything about Flowerhorn tank size.

When it comes to keeping a Flowerhorn tank, size definitely matters. Larger tanks provide more space for your fish to swim and grow while reducing the risk of ammonia and nitrate build-up. In addition, Flowerhorns are generally large fish species. Deciding to bring them home to take care of them requires having a proper fish tank where these species can thrive peacefully.

In this complete guide to Flowerhorn tank size, we’ll help you determine the right dimensions for your aquatic pet’s home. So, whether you’re looking to buy or DIY, keep reading to learn everything you need to know!

Here is a summary of what you’ll see in this Flowerhorn Diseases article:

  1. Minimum Tank Size For One Flowerhorn
  2. Tank Size in CM, Inches, & Feet
  3. Full Body, Short Body, &  Bonsai Flowerhorns
  4. Full Body Flowerhorn Tank Size
  5. Short Body Flowerhorn Tank Size
  6. Tank Size for Juvenile Flowerhorn
  7. How Fast Flowerhorns Grow
  8. Tank Size for Breeding Pair
  9. FAQs
  10. Flowerhorn Tank Size Summary

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flowerhorn tank size

Minimal Tank Size For One Flowerhorn

Flowerhorn cichlids are actually not challenging to care for. All you need is a heavy-duty fish tank with a suitable size to allow your pet fish to thrive and swim comfortably. In addition, you must also ensure that there are stable water conditions inside the tank. When interacting with other species, you must be more patient with a Flowerhorn’s behavior and temperament. 

Your fish tank’s size depends on how big your Flowerhorn will grow. Generally, adult male Flowerhorns can reach 16 inches in length, while their female counterparts are smaller and weigh lighter. The minimum tank size recommended for a single Flowerhorn Cichlid is around 70 to 75 gallons. So if you are getting an average-sized tank, this fish species might not be for you. 

Getting a big tank for your Flowerhorns allows for better regulation of ammonia in the water, making it safer for your pet fish to swim in. Additionally, the water volume is higher because it’s a bigger tank, so the waste and debris concentration is less. This means that the water conditions are optimally clean for your Flowerhorns.

What’s more, since Flowerhorns are aggressive and normally roam around in its entire space, you shouldn’t put any decorations. While you can place rocks, pebbles, or gravel, you must always ensure that the Flowerhorns don’t damage themselves or anything in the tank. If you wish to place plant decorations, the plastic ones are the best because they would just eat or destroy the real ones. 

Tank Size in CM, Inches, & Feet

The exact dimensions of the right tank size depend on the type of Flowerhorn you bring home. For instance, a Flowerhorn fry which is approximately 1 inch in size, should have a tank size recommendation ranging from 2.4 to 3.2 cubic feet. That is around 12” by 12” by 24” or 12” by 16” by 24” in inches or 30 by 30 by 60 cm. 

On the other hand, small to medium-sized Flowerhorn cichlids require the same dimensions for their tanks, around 8 to 11 cubic feet. Converting to inches, the tank size dimensions would be around 18” by 18” by 36” or 18” by 18” by 48”. In centimeters, it’s around 46 by 46 by 91. 

You would generally need an even bigger fish tank for your large-sized Flowerhorns. The recommended dimensions for larger-sized species are around 11 to 12 cubic feet, or 18” by 21” by 48” and 46 by 53 by 91 centimeters. 

Full Body, Short Body, &  Bonsai Flowerhorns

Full body, short body, and Bonsai Flowerhorns have corresponding tank size requirements to ensure that they live and thrive peacefully with stable water conditions and an optimal environment. 

Full Body Tank Size 

As mentioned, full-bodied Flowerhorns can grow up to around 15 to 20 inches in length, so it’s best to get a fish tank ranging from 70 to 90 gallons. For larger Flowerhorns, it’s best to get a 120-gallon tank to ensure the peaceful thriving of the fish. Full-bodied Flowerhorns generally have longer lifespans, reaching 8 to 12 years compared to their short-bodied counterparts. 

Short Body Tank Size 

As their name suggests, short-bodied Flowerhorns have shorter body lengths because they are bred to adapt to a slower pace of growth. They generally vary around 3 to 9 inches in size. The male species grow up to 6 to 7 inches while their female counterparts reach 5 to 6 inches and stop growing. 

However, even when short-bodied Flowerhorns are smaller, the minimum requirement for their tank size is still recommended to be 75 gallons. This is the best size that can allow your pet fish to swim freely inside the tank without compromising the water conditions. You can also choose a 50-gallon fish tank if your Flowerhorn is at most 4 inches in length. 

Bonsai Flowerhorns 

Bonsai Flowerhorns are also short but have round and beautiful bodies. Their bodies are beautifully colored, and their Koks are prominent, making them stand out inside a fish tank. 

Similar to the normal short-bodied Flowerhorns, the growth of Bonsai Flowerhorns is slower than normal and does not exceed 8 inches. However, like any other variety of Flowerhorns, you still need a big fish tank for these species, around 70 to 75 gallons.

Tank Size for Juvenile Flowerhorn

When a Flowerhorn fry in a 15-gallon fish tank starts to grow and reach the juvenile stage, it’s time to get a larger tank. This is because an insufficient tank size can affect the head growth of the fish and, at the same time, cause disturbances in the tank’s water conditions. 

Therefore, when your pet becomes a juvenile Flowerhorn with a size reaching 3 inches in length, you need to get at least a 30-gallon tank. 

How Fast Flowerhorns Grow

Different Flowerhorn species grow at different rates and fully develop during their first year most of the time. A Flowerhorn with a lifespan of 10 to 12 years can normally grow and reach its maximum size in two years or even less. As mentioned, short-bodied ones grow slower and can only achieve a maximum of 9 inches in length. 

Ultimately, the timeframe for your Flowerhorns to grow and reach their full-size potential still varies depending on their genetic makeup and how much care and attention you give. 

Tank Size for Breeding Pair

When a single Flowerhorn requires at least a 70 to 75-sized gallon, you need to get a bigger one when you desire to place a breeding pair in one tank. Normally, around 200 to 300 gallons is enough. A large fish tank is recommended so both parties can live and thrive comfortably in the water while preventing the male Flowerhorn from attacking the female. 

Additionally, Flowerhorn species can get aggressive, so you should always get a big fish tank that allows them to move peacefully when you desire to keep them in pairs. 

Frequently Asked Questions (FAQs)

Why are Flowerhorns kept alone in tanks?

Aside from the fish tank size, it’s also best to keep these Flowerhorns alone in aquariums and tanks. This is mainly because of their aggressive temperaments and behaviors, especially when placed in the same area as other fish species. Additionally, if you want to place various fish species, including Flowerhorns, together, you must check their compatibility properly. 

Not all species can be Flowerhorn’s tank mates, and checking the compatibility is crucial in ensuring that each fish variant is not stressed and can thrive comfortably in the water. Generally, Flowerhorns become even more aggressive when they sense that something is in their territory. This is one of the key reasons for having ample space for them, especially when you plan to place other fish variants in the tank. 

Another reason why it’s best to keep them alone in tanks is because they love investigating where they live. You would normally see them roaming around near the surface or checking out the tank’s substrate. However, if you still wish to have them thrive with another species, the easiest fish you can get is another Flowerhorn of the same breed. 

Can I keep a Flowerhorn in a 35 Gallon Tank?

If you want to keep smaller juvenile Flowerhorn in a 35 gallon tank it might be ok for a short period of time. At most fish stores they are kept in small sectioned off areas, sometimes less than 10 gallons.

However, keep in mind that these fish grow fast and you’ll be feeding them a lot more often than in a pet store.

For these reasons the ideal tank size for Flowerhorns is a larger 60 o 75 gallon aquarium.

Why do Flowerhorns need a divider?

Dividers are normally needed when two Flowerhorn siblings are placed in one fish tank, especially when both are males. The divider protects the younger fish from getting bullied. Feed the smaller Flowerhorn so that they will get bigger, and that will only be when you can remove the divider. 

Additionally, dividers or partitions also prevent any death fights between Flowerhorns because of their territorial and aggressive nature. Another important purpose of a divider is during the breeding season. Using one can allow water to flow through between the male and the female Flowerhorn is a great way to stimulate mating. 

What do Flowerhorns like in their tank?

Flowerhorn are usually kept in bare bottom tanks with no decorations. However, they don’t mind having places to hide in. For most fish keepers me included we like for the Flowerhorn to be the focal point of the aquarium.

This means a lightly scaped tank, maybe with some substrate, but very minimalistic with the décor.

Remember to keep sharp items out of the aquarium as they can prove to be hazard to your Flowerhorn.

Flowerhorn Tank Size Summary 

Flowerhorns are large fish species with territorial and aggressive natures. They require big fish tanks to ensure they can thrive peacefully in water without encountering any problems. Should you wish to bring one home as a pet, consider the tank size requirements and Flowerhorn variants mentioned in this blog. 

Additionally, you should not forget the best tank decor to put that will not affect how your Flowerhorns shall behave. With those key factors in mind, you can certainly find the perfect fish tank you need to grow your Flowerhorn beautifully and healthily. 

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