Arowana Fish Aquarium Setup – The Ultimate Expert Guide To Raising Arowanas

Keeping a “Dragon Fish” is the ultimate dream for many hobbyists, and it is easy to see why these majestic creatures are so captivating.

If you have been eyeing that sleek Silver or stunning Jardini at your local store, you probably know that a standard tank just won’t cut it.

In this guide, I will show you exactly how to execute a professional arowana fish aquarium setup that ensures your fish thrives for decades.

We will cover everything from selecting the massive footprint they require to the high-end filtration needed to keep their water pristine and crystal clear.

The Foundation: Choosing the Right Tank Size and Dimensions

When planning your arowana fish aquarium setup, the first thing you must realize is that length and width are far more important than height.

Arowanas are surface dwellers that need ample “turning room” to prevent spinal deformities and stress as they grow into massive adults.

For a juvenile, a 55-gallon tank might work temporarily, but these fish grow at an incredible rate, sometimes an inch per month.

Minimum Tank Requirements by Species

If you are keeping a Silver Arowana, you are looking at a fish that can easily reach 30 to 36 inches in captivity.

For these giants, a tank with a minimum footprint of 6 feet long and 2.5 to 3 feet wide is the absolute baseline for long-term health.

Smaller species, like the Jardini or the Asian Arowana, can sometimes manage in a 120-gallon or 150-gallon tank, but bigger is always better.

Why Glass Thickness and Quality Matter

Arowanas are powerful, muscular fish that can create significant force when they get spooked or decide to strike at a piece of food.

Ensure your aquarium is made of thick, high-quality glass or, ideally, acrylic, which offers better impact resistance and insulation for tropical temperatures.

Don’t worry—while the initial investment is high, a sturdy tank is a one-time purchase that protects both your fish and your flooring!

Advanced Filtration for Heavy Bioloads

Arowanas are “messy” eaters and produce a significant amount of waste, meaning your arowana fish aquarium setup requires heavy-duty filtration.

Standard “hang-on-back” filters are rarely enough for a full-grown specimen; you need systems that can handle massive biological and mechanical loads.

I highly recommend using a large sump system or at least two high-capacity canister filters running in tandem for redundancy.

The Role of Biological Media

Because these fish eat high-protein diets, ammonia and nitrite levels can spike quickly if your beneficial bacteria colony isn’t robust enough.

Fill your filter trays with high-surface-area media like ceramic rings, bio-balls, or sintered glass to ensure maximum detoxification of the water.

A good rule of thumb is to have a filtration flow rate that turns over the entire volume of the tank at least 5 to 10 times per hour.

Mechanical Filtration and Maintenance

Large fish mean large debris, so you will want easy access to your mechanical sponges or filter socks for weekly cleaning.

Clogged filters lead to nitrate buildup, which can cause “HLLE” (Head and Lateral Line Erosion) or stunted growth in developing juveniles.

By keeping your mechanical media clean, you ensure that the water remains polished and free of floating particulates that distract from the fish’s beauty.

The Critical Importance of a Secure, Weighted Lid

If there is one thing an experienced keeper will tell you, it is that arowanas are world-class jumpers.

In the wild, they leap several feet out of the water to catch insects and even small birds from overhanging branches.

In a home arowana fish aquarium setup, a gap as small as a few inches is an invitation for a tragic accident.

Tight-Fitting Lids are Not Enough

A full-grown arowana can easily knock a standard plastic hood right off the top of a tank during a jump.

You must use heavy glass tops or custom acrylic lids that are either weighted down or secured with sliding locks.

Some hobbyists even use “egg crate” light diffusers under their lids for extra reinforcement, though this can sometimes scratch the fish.

Preventing “Jump Startle”

Arowanas are prone to being spooked by sudden movements or lights turning on in a dark room.

Try to place your aquarium in a low-traffic area and use a light timer that has a “ramp-up” feature to simulate a natural sunrise.

This small detail can prevent your fish from crashing into the lid and injuring its delicate barbels or scales.

Perfecting Water Chemistry and Temperature

Coming from the slow-moving rivers of South America, Southeast Asia, and Australia, these fish appreciate specific water conditions.

While they are relatively hardy once established, maintaining stability is the secret to a long-lived fish.

Fluctuations in pH or temperature can weaken their immune systems, making them susceptible to fungal infections or parasites.

Ideal Parameters for Success

Most arowanas prefer slightly acidic to neutral water, with a pH ranging between 6.0 and 7.0.

The temperature should be kept consistently warm, ideally between 75°F and 82°F (24°C to 28°C).

Invest in two smaller heaters rather than one large one; this way, if one fails “on,” it won’t cook the fish before you notice.

Managing Nitrates and Water Changes

Even with the best filtration, nothing replaces the benefits of regular, large-scale water changes.

Aim to change 25% to 30% of the water weekly to keep nitrates below 20 ppm, which promotes better appetite and color.

Using a “Python” style water changer will make this process much easier for you and less stressful for your aquatic dragon.

Decorating Your Arowana Fish Aquarium Setup

When it comes to decor, “less is more” is a great philosophy for a large predatory fish tank.

Arowanas need open swimming space, and jagged rocks or sharp driftwood can easily scrape their sides during a fast turn.

If you want a natural look, stick to smooth river stones and large pieces of well-secured bogwood.

Substrate Choices: Sand vs. Bare Bottom

Many professional keepers prefer a bare-bottom tank because it is incredibly easy to keep clean and prevents waste buildup.

However, if you prefer a substrate, fine aquarium sand is the safest choice for your arowana fish aquarium setup.

Avoid large gravel, as arowanas may accidentally swallow it while feeding off the bottom, leading to dangerous intestinal blockages.

Adding Live Plants

While arowanas won’t eat plants, their size and power mean they can easily uproot delicate species.

Hardy plants like Anubias or Java Fern attached to driftwood are excellent choices because they don’t require substrate.

Floating plants can also provide a sense of security for the fish, though they must be managed so they don’t clog the overflow or filter intake.

Choosing Compatible Tank Mates

While some arowanas (like the Jardini) are notoriously aggressive and prefer to live alone, others are quite social.

The key to choosing tank mates is finding fish that are too large to be eaten but not aggressive enough to nip at the arowana’s long fins.

Remember, if a fish can fit in an arowana’s mouth, it eventually will—even if they have been “friends” for months!

Top Choices for Community Life

Bottom-dwelling fish are often the best companions because they stay out of the arowana’s surface territory.

Large species of Plecostomus, Freshwater Stingrays, and ornate Bichirs (Polypterus) make fantastic additions to the lower levels.

For the middle of the tank, consider large Silver Dollars, Datnoids, or robust Cichlids like the Oscar or Severum.

Avoiding Fin Nippers and Bullies

Avoid any fish known for fin nipping, such as smaller Tetras or certain Barbs, as they will shred the arowana’s trailing fins.

Likewise, overly aggressive Cichlids like the Flowerhorn or Umbee can stress an arowana to the point of illness.

Always observe new additions closely for the first 48 hours to ensure everyone is getting along peacefully.

Nutrition and Feeding for Growth and Color

In the wild, arowanas are opportunistic predators, but in your home aquarium, variety is the spice of life.

A diet consisting solely of “feeder fish” is often nutritionally incomplete and carries a high risk of introducing diseases.

I always encourage hobbyists to transition their fish to high-quality floating pellets as soon as possible.

Safe Live and Frozen Foods

If you want to supplement their diet, frozen krill, silversides, and bloodworms are excellent sources of protein and carotene.

Live insects like crickets or mealworms are also great, but ensure they are “gut-loaded” with nutritious veggies before feeding.

Avoid feeding fatty meats like beef heart too often, as this can lead to fatty liver disease in large predatory fish.

Preventing “Drop Eye” Through Feeding

“Drop Eye” is a common condition where one or both eyes of the arowana begin to point downward permanently.

While genetics play a role, many experts believe that feeding sinking food causes the fish to constantly look down, contributing to the issue.

By using floating pellets and avoiding distractions at the bottom of the tank, you can help keep your fish’s eyes focused where they belong.

Common Challenges in Arowana Care

Every hobbyist will face a few hurdles, but being prepared makes all the difference in the world.

From water quality issues to physical injuries, knowing what to look for can save your fish’s life.

Don’t be discouraged if you run into a snag—even the most experienced keepers have had to learn these lessons!

Dealing with External Parasites

New fish should always be quarantined, but if Ich or velvet appears in your main tank, act quickly.

Arowanas are sensitive to certain medications, particularly those containing high levels of copper or malachite green.

Always start with a half-dose of any medication and increase the aeration in the tank to compensate for the medicine’s impact on oxygen levels.

Healing Torn Fins and Missing Scales

Because they are so active, it is not uncommon for an arowana to lose a scale or tear a fin on a piece of decor.

Fortunately, these fish have incredible regenerative powers if the water quality is kept near-perfect.

Adding a bit of aquarium salt (1 tablespoon per 5 gallons) can help prevent secondary infections while the fish heals naturally.

FAQ: Common Questions About Arowana Setup

How long do arowanas live in a home aquarium?

With proper care and a large enough tank, an arowana can easily live for 15 to 20 years, and some have been known to exceed 30!

Can I keep two arowanas together in the same tank?

This is generally not recommended unless you have a massive “monster” tank (300+ gallons). They are territorial and will often fight for dominance.

Do arowanas need special lighting?

They don’t have strict lighting requirements, but a “tanning” light can help enhance the reds and golds in Asian or South American species.

What is the best way to cycle a large arowana tank?

I recommend a “fishless cycle” using pure ammonia. This ensures your bio-filter is ready for the massive waste load of a large predator from day one.

How often should I feed my arowana?

Juveniles should be fed small amounts 2-3 times a day to support rapid growth, while adults only need to eat once a day or even every other day.

Conclusion

Creating a successful arowana fish aquarium setup is a rewarding journey that brings a piece of the prehistoric world into your home.

It requires a commitment to space, high-quality filtration, and consistent maintenance, but the result is a breathtaking centerpiece.

Remember to prioritize a wide tank footprint, a secure lid, and a varied diet to ensure your “Dragon Fish” stays healthy and vibrant.

If you take it one step at a time and focus on stability, you will find that keeping these giants is one of the most fulfilling experiences in the hobby.

Happy fish keeping, and enjoy the majesty of your new arowana!