By The Glass and Gill – Aquascape
Some fish draw attention.
Arowana command it.
From the moment they enter a tank, everything shifts. Their movement is deliberate, their awareness is constant, and their presence dominates the entire upper water column.
They don’t blend into an aquarium.
They define it.
And unlike many other showcase fish, Arowana aren’t static. They are active, responsive, and constantly interacting with their environment.
Which means building a system around them isn’t optional.
It’s required.
A Fish Built for Space and Movement
Arowana aren’t just large—they are designed differently.
Long, powerful bodies. Upward-facing mouths. Smooth, gliding movement just beneath the surface.
Everything about them is built for open water.
Which is why confinement is one of the biggest mistakes new keepers make.
It’s not just about tank volume.
It’s about usable space.
Arowana need room to turn, to cruise, to move without restriction. Tight layouts, overcrowded aquascapes, or limited surface area disrupt that natural behaviour.
At an advanced level, you don’t decorate an Arowana tank.
You create space within it.
The Surface Zone: Where Everything Happens
Most aquarium fish occupy the middle or lower levels.
Arowana live at the top.
That changes how you think about design entirely.
The surface isn’t just where they swim—it’s where they hunt, feed, and interact with their environment.
Which means:
- Open areas are essential
- Obstructions should be minimal near the surface
- Lighting needs to be balanced—not harsh or overly intense
Too much clutter below can still work.
Too much structure above cannot.
Because for Arowana, the top layer is everything.
Tank Design: Strength and Simplicity
Unlike planted systems or highly detailed aquascapes, Arowana tanks lean toward simplicity.
Not because complexity isn’t possible—but because it often interferes with function.
Heavy hardscape, unstable décor, or intricate layouts create risk. Arowana are powerful fish, and sudden movements can easily shift or damage poorly secured structures.
So the approach becomes intentional.
Stronger materials. Clean lines. Stable structures.
And above all—space to move without interruption.
Feeding Behaviour: Controlled Instinct
Feeding an Arowana is where their predatory nature becomes most obvious.
They strike upward. Fast, precise, and with force.
It’s one of the most engaging aspects of keeping them—but also one that needs control.
Unstructured feeding leads to problems:
Overfeeding affects water quality
Erratic feeding habits increase aggression
Surface chaos increases stress and injury risk
At an advanced level, feeding becomes routine and deliberate.
Not just to maintain health—but to maintain behaviour.
Because a well-fed, well-managed Arowana behaves very differently from one that is overstimulated or inconsistent.
The Lid Problem: A Non-Negotiable Detail
There’s one aspect of Arowana care that defines the entire setup.
They jump.
And not occasionally.
Powerfully.
In the wild, this behaviour allows them to catch prey above the water’s surface. In an aquarium, it becomes one of the greatest risks.
An uncovered tank—or even a poorly secured lid—is not an option.
At this level, the lid isn’t an accessory.
It’s part of the system itself.
Strong, secure, and designed to handle impact.
Because overlooking this detail often ends in failure—no matter how well everything else is managed.
Water Quality and Flow
Unlike more delicate species, Arowana are often described as “hardy.”
And in some ways, they are.
But that doesn’t mean they tolerate poor conditions well.
They still produce significant waste. They still rely on oxygen-rich, clean water. And over time, poor maintenance will show—just not always immediately.
Flow becomes important here—but not excessive.
You’re not creating turbulence.
You’re maintaining circulation.
Enough to keep oxygen levels high and waste moving toward filtration—without disrupting their natural movement at the surface.
Tankmates: Choosing Carefully
One of the most common questions around Arowana is compatibility.
And the answer is always the same:
It depends.
Because Arowana are not passive fish.
Anything small enough will eventually be seen as food. Anything overly aggressive can create stress or conflict.
Successful tankmate choices come down to balance:
- Similar size
- Compatible temperament
- Enough space to avoid constant interaction
But even then, nothing is guaranteed.
At this level, introducing tankmates isn’t about filling space.
It’s about understanding risk—and accepting it.
The Advanced Mindset Shift
Keeping Arowana changes how you approach aquarium design.
You stop focusing on detail.
And start focusing on scale.
Instead of asking:
“What can I add?”
You begin asking:
“What does this fish need to move naturally?”
That shift removes unnecessary complexity.
Because Arowana don’t need more.
They need the right environment.
Final Thoughts
There’s a reason Arowana are often considered one of the ultimate showcase fish.
Not just because of their size.
But because of their presence.
When kept correctly:
Their movement becomes fluid and uninterrupted
Their behaviour becomes controlled, not reactive
The entire tank feels expansive—even within glass walls
That’s when everything comes together.
At The Glass and Gill – Aquascape, we believe Arowana represent a different side of fishkeeping.
Less about detail.
More about space, movement, and control.
Because at this level, success isn’t about what’s in the tank.
It’s about what the tank allows.
0 comments