Author: Joe

The Dutch style is the oldest school of aquascaping: a dense, hardscape-free display built entirely from plants. Where other styles lean on rock and driftwood, a Dutch tank throws them out and lets tiered rows of contrasting stem plants, the famous “Dutch streets”, carry the whole composition. It’s gardening underwater, not landscaping.

Where it comes from

The style grew up in the Netherlands from the 1930s onward, shaped by the Dutch aquarium society, the NBAT, which still runs a competition circuit with famously strict scoring rules. That pedigree shows. A proper Dutch scape is a manicured underwater garden rather than a wild slice of nature, judged on tidiness, contrast and plant health as much as on beauty.

What makes a tank “Dutch”

Take away the rocks and wood, and a handful of rules do the heavy lifting:

• Dutch streets. Diagonal rows of plants, graded low to tall, that lead the eye into the tank: planted along a sightline rather than straight across the glass.
• Groups, not specimens. Each species sits in a defined clump, never dotted around, so colours and leaf textures read as solid blocks.
• Colour and contrast. Reds against greens, fine leaves against broad ones. A single red group often does the job a focal rock would in another style.
• Density. Convention keeps roughly 70% of the substrate planted, with little open space and no bare hardscape on show.

The plants that do the work

Dutch scapes live and die on stem plants, fast growers you trim, top and replant constantly to keep those streets sharp. A few workhorses turn up again and again:

Plant	Latin name	Light	CO₂	Difficulty
Rotala	Rotala rotundifolia	Med–high	Beneficial	Easy–med
Ludwigia repens	Ludwigia repens	Medium	Beneficial	Easy
Alternanthera reineckii	Alternanthera reineckii	Med–high	Beneficial	Medium
Bacopa	Bacopa caroliniana	Low–med	Not required	Easy

Notice the pattern: the colour plants want strong light, and they reward added CO₂ with tighter growth and deeper reds. Alternanthera reineckii in particular only shows its best burgundy under high light. Starve it and it drifts toward a muddy green. Bacopa caroliniana is the exception and the safety net: a hardy green backbone that doesn’t need CO₂ to behave.

Is the Dutch style for you?

Be honest with yourself about trimming. A Dutch tank is one of the most maintenance-heavy styles there is: those streets only look crisp because someone prunes and replants them on a schedule, often weekly once the plants take off. If you find pruning meditative, it’s deeply satisfying work. If you want set-and-forget, a low-tech Walstad tank or a simple Iwagumi will frustrate you far less.

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Dutch style questions

Is the Dutch style harder than other aquascaping styles?

Generally yes, though the work is in maintaining it rather than setting it up. The look depends on dense, fast-growing stem plants, and keeping them tidy means regular trimming, topping and replanting. The skill is in the upkeep, not the initial layout.

Do you need CO₂ for a Dutch aquascape?

In practice, almost always. The colourful stem plants Dutch scapes rely on grow denser and colour up far better with added CO₂ and strong light. You can build a greener, simpler version without it, but the classic vivid, packed Dutch look is hard to reach on a low-tech setup.

What’s the difference between Dutch and Nature Aquarium styles?

Hardscape. A Nature Aquarium is built around rock and driftwood arranged to evoke a landscape, with plants supporting that structure. A Dutch tank uses no hardscape at all. The plants are the design, arranged like beds in a formal garden rather than a wild scene.

The Nature Aquarium is the style most people picture when they imagine aquascaping: driftwood and rock arranged to evoke a real landscape such as a forest, a hillside or a riverbank, with plants softening the structure until it looks grown rather than built. It’s the style Takashi Amano made famous, and the one the others are usually measured against.

Where it comes from

The Nature Aquarium was developed by the Japanese photographer and designer Takashi Amano, whose company ADA still sets much of the aesthetic standard through its annual international layout contest. Amano borrowed from Japanese garden design and the idea of capturing the feeling of a natural scene in miniature, suggesting a place rather than copying one exactly. The minimalist, stone-only Iwagumi layout is really a sub-style within this broader approach.

What defines it

• Hardscape first. Driftwood and rock set the structure before a single plant goes in: the layout should read as a landscape even bare.
• Asymmetry and a focal point. Built on the rule of thirds, with the eye led to one dominant feature rather than a centred, symmetrical scene.
• Depth. Foreground carpets, midground detail and taller background planting create the illusion of distance.
• A grown-in feel. Mosses and epiphytes soften the wood until it looks aged, not placed.

The plants that suit it

Because the hardscape leads, much of the planting is epiphytes and mosses lashed to wood and rock. These do not root in substrate and they age the layout well:

Plant	Latin name	Light	CO₂	Difficulty
Anubias nana	Anubias barteri var. nana	Low	Not required	Easy
Java fern	Leptochilus pteropus	Low	Not required	Easy
Bucephalandra	Bucephalandra sp.	Low–med	Beneficial	Easy
Christmas moss	Vesicularia montagnei	Low–med	Beneficial	Easy–med

Carpets and stem plants then fill the floor and background. Branching spider wood is a favourite for the canopy effect, with Java fern and Anubias attached along its length.

Nature Aquarium vs the others

Set it beside a Dutch tank and the contrast is stark: Dutch is a formal garden with no hardscape and tidy plant rows, while a Nature Aquarium is a wild landscape held together by wood and stone.

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Nature Aquarium questions

Is the Nature Aquarium style good for beginners?

It can be. The epiphytes and mosses it leans on are hardy and low-tech, so a simple version is achievable early. The harder part is the composition. Arranging hardscape that reads as a believable landscape takes practice rather than equipment.

What’s the difference between Nature Aquarium and Iwagumi?

Iwagumi is a minimalist, stone-only sub-style with usually a single carpet plant. The Nature Aquarium is the broader school it sits inside, and freely uses driftwood and a wider mix of plants.

Do you need CO₂ for a Nature Aquarium?

It depends on the planting. A moss-and-epiphyte layout can run low-tech, but the detailed, carpet-heavy contest-style tanks almost always use added CO₂ and strong light to get that lush, filled-in look.

The jungle style is aquascaping’s wild child: dense, overgrown and deliberately untamed. Where other styles prize clean lines, the jungle look leans into controlled chaos, with big leaves, trailing growth and a canopy of floating plants, and any hardscape long since swallowed by greenery. It’s the most forgiving style to live with, and arguably the most relaxing to look at.

The look

What marks a tank as jungle rather than just untidy:

• Big, bold foliage. Large swords and broad crypts, not fine carpets.
• Layered overgrowth. Plants allowed to grow tall and lean, filling the water column.
• Floating cover. Surface plants throwing dappled shade, like a forest canopy.
• Hidden structure. Rock and wood are there, but mostly concealed by growth.

Plants for a jungle

Reach for large, hardy plants that look good a little unruly:

Plant	Latin name	Light	CO₂	Difficulty
Amazon sword	Echinodorus grisebachii	Medium	Not required	Easy
Java fern	Leptochilus pteropus	Low	Not required	Easy
Cryptocoryne wendtii	Cryptocoryne wendtii	Low–med	Not required	Easy
Amazon frogbit	Limnobium laevigatum	Any	Not required	Easy

Tall Vallisneria fills the back wall, the Amazon sword anchors the midground, and floating plants like frogbit complete the canopy. Nearly all of it tolerates low light, which is what makes the style so easy-going.

The forgiving upside

Because the look is meant to be a bit wild, the jungle style hides a multitude of sins. You can skip the precise weekly trimming a Dutch tank demands, most of its plants are hardy low-tech species, and an overgrown corner reads as character rather than failure. It’s a great match for a planted-tank beginner who wants lush results without the maintenance treadmill, much like a Nature Aquarium but with less composition pressure.

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Jungle style questions

Is the jungle style good for beginners?

Yes. It is one of the friendliest places to start. The plants are hardy, the look forgives imperfect growth, and there’s no demand for precise trimming or a high-tech setup.

Do you need CO₂ for a jungle aquascape?

No. Most jungle plants are low-tech species that grow fine without it. Added CO₂ will speed growth and fill the tank faster, but it isn’t essential to the style.

What’s the difference between jungle and Nature Aquarium styles?

A Nature Aquarium is a deliberately composed landscape. The jungle style is intentionally wilder and less structured. Both look natural, but the jungle embraces overgrowth where the Nature Aquarium controls it.

The Walstad method is a philosophy more than a look: build a planted tank that runs itself. Named after Diana Walstad, it puts ordinary soil under the gravel and plants the tank heavily, creating a low-tech, self-balancing setup with no CO₂ injection and very few water changes once it settles.

The idea

The argument is that a densely planted tank can balance itself. The plants feed on fish waste and nutrients released by the soil, and the fish in turn live in a stable, plant-filtered environment. Get the balance right and the tank needs very little intervention, which is the entire appeal.

How it works

• Soil substrate. A thin layer of plain garden or potting soil, capped with gravel or sand to hold it in place.
• Heavy planting from day one. Lots of fast-growing and floating plants to outcompete algae while the tank establishes.
• Low tech. Modest lighting, no pressurised CO₂, minimal dosing.
• Patience. It can look rough for the first few weeks while the soil settles and roots take hold. The balance comes later.

Let the plants and the soil do the filtering.

Plants that thrive

Stick to hardy, low-light species that don’t need CO₂:

• Anubias (Anubias barteri var. nana): low light, no CO₂ needed.
• Java fern (Leptochilus pteropus): low light, attaches to wood.
• Cryptocoryne wendtii: an undemanding rosette. Expect some “melt” after planting before it recovers.
• Floating plants such as Amazon frogbit (Limnobium laevigatum): fast nutrient sponges that shade out algae early on.
• Bacopa caroliniana: a hardy green stem that grows fine without CO₂.

The trade-offs

It’s genuinely low-effort once established, but it isn’t magic. The soil can cause a cloudy, ammonia-heavy first few weeks, so it’s not an instant display tank. You’re trading the control and vivid colour of a high-tech Dutch layout for simplicity, and the demanding species in our carpet plants guide generally won’t thrive here without CO₂. If you want hands-off and natural, it is ideal. If you want a manicured showpiece, look elsewhere. New to planted tanks? Pair this with our beginner’s guide and the substrate rundown.

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Walstad method questions

Do you need CO₂ for a Walstad tank?

No. Going without CO₂ is the whole point. The method relies on soil and heavy planting rather than injected carbon, so it’s deliberately low-tech.

Do you have to do water changes with the Walstad method?

Fewer than a conventional tank once it’s balanced, but “none ever” is overstated. Keep an eye on parameters, especially during the early establishment phase, and change water if they drift.

Is the Walstad method good for beginners?

In effort, yes. It is very hands-off once running. The catch is the messy, cloudy start and the patience it demands, which is where some beginners lose their nerve before the tank finds its balance.

A biotope aquarium sets itself a stricter brief than any other style: recreate one real place. Every fish, plant, rock and piece of wood is chosen because it actually occurs together in a specific natural habitat, whether that is a particular South American stream or a Southeast Asian peat swamp. Accuracy is the point, and beauty is a by-product.

What makes it a biotope

The defining rule is authenticity. A biotope is a deliberate reconstruction of a named environment, down to the water chemistry, not simply a tank with some wood and tannins in it. Many true biotopes are sparsely planted: a blackwater stream is mostly leaf litter, branches and tea-stained water, with barely a green leaf in sight. Restraint is part of the discipline.

A discipline, not a decor

This is where it parts ways with the Nature Aquarium. A Nature Aquarium suggests nature artistically and will happily mix plants from different continents if they look right together. A biotope refuses to: if a species isn’t found in that habitat, it doesn’t go in, however good it would look. It’s the most research-led corner of the hobby, and biotope competitions are judged largely on how faithfully a tank matches the real location.

Matching the region

Plant choice follows geography. A few examples using species from our reference:

• Southeast Asian streams: Cryptocoryne wendtii and Bucephalandra, both Asian natives.
• South American waters: Amazon sword (Echinodorus grisebachii) and Vallisneria.
• Blackwater habitats: often almost no plants at all, where the planting is leaf litter and submerged branches.

Whatever the region, the test is the same: would these species actually meet in the wild? If not, what you have is a nature-style tank with good intentions. Browse the other approaches on the styles hub if strict accuracy isn’t your goal.

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Biotope questions

What’s the difference between a biotope and a Nature Aquarium?

A biotope faithfully reproduces a real habitat using only species that live there together. A Nature Aquarium is an artistic impression of nature and mixes plants and hardscape freely for the best look.

Do biotope aquariums need a lot of plants?

Not always. Many authentic biotopes are sparsely planted or have none at all. Leaf litter, wood and the right water often matter more than greenery.

Are biotope aquariums good for beginners?

The tank itself can be simple and low-tech. The hard part is the research. Identifying a real habitat and sourcing only species that belong there is what makes a biotope demanding.

Iwagumi is a minimalist Japanese aquascaping style built around an odd number of carefully placed stones, usually three, and typically a single carpeting plant. Popularised by Takashi Amano, it prizes open space, asymmetry and one clear focal point, creating a calm, natural-looking underwater landscape rather than a densely planted display.

Where Iwagumi comes from

The word iwagumi means “rock formation” in Japanese, and the style grew out of the Nature Aquarium movement led by Takashi Amano. It borrows directly from Japanese garden design and Zen aesthetics: restraint, balance and the suggestion of a much larger landscape inside a small space. Where a Dutch-style tank is a lush plant showcase, Iwagumi is the opposite. Stone is the star, and the planting is deliberately simple.

The stones and their roles

A classic Iwagumi uses an odd number of stones (three, five or seven) so the layout never falls into symmetry. In a three-stone arrangement each rock has a defined role:

• Oyaishi: the main stone. The largest, set at an angle and placed off-centre as the composition’s single focal point.
• Fukuishi: the second stone. Smaller than the Oyaishi, it sits to one side and balances it.
• Soeishi: the supporting stone. Smaller again, it complements the two main stones rather than competing with them.
• Suteishi: the “sacrificial” stone. The smallest, often partly buried, adding naturalness without drawing the eye.

One more rule of thumb: use a single type of stone throughout, with Seiryu stone and dragon stone the common choices, so the formation reads as one natural outcrop rather than a collection of unrelated rocks.

Composition principles

• The rule of thirds: the Oyaishi sits about a third of the way across, never centred.
• A single focal point: everything guides the eye to the main stone.
• Negative space: open substrate and open water are part of the design, not gaps to fill.

Plants for an Iwagumi

Iwagumi almost always uses one carpeting species, kept low so the stones dominate. Because a tight carpet generally needs strong light and added CO₂, Iwagumi tanks are usually high-tech setups. The common choices:

Carpet plant	Latin name	Light	CO₂	Difficulty
Dwarf hairgrass	Eleocharis acicularis	High	Required for a true carpet	Medium
Monte Carlo	Micranthemum tweediei	Med–high	Beneficial→required	Medium
Dwarf baby tears (HC Cuba)	Hemianthus callitrichoides ‘Cuba’	High	Required	Advanced
Glossostigma	Glossostigma elatinoides	High	Required	Advanced

Monte Carlo and dwarf hairgrass are the more forgiving starting points. HC Cuba and Glossostigma give the finest carpet but are the most demanding.

Livestock

The open water above the carpet suits small, peaceful schooling fish and shrimp. Ember tetra (Hyphessobrycon amandae), chili rasbora (Boraras brigittae) and Amano shrimp (Caridina multidentata), which also grazes algae, are popular. Because compatibility depends on the full combination of tank size, temperament and water parameters, run any stocking list through a stocking calculator before you buy rather than assuming individual species will get along.

Common mistakes

• Using an even number of stones, or a symmetrical layout.
• Mixing different rock types, which breaks the natural look.
• Filling the open space instead of treating it as part of the design.
• Choosing a demanding carpet without the strong light and CO₂ it needs to grow flat.

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Iwagumi questions

How many stones do you need for an Iwagumi?

An odd number, classically three: the Oyaishi (main), Fukuishi (second) and Soeishi (supporting). That keeps the arrangement asymmetrical. Larger tanks may use five or seven.

Do you need CO₂ for an Iwagumi tank?

Usually yes. The carpeting plants Iwagumi relies on need strong light and added CO₂ to grow into a dense, flat carpet, so most Iwagumi tanks run CO₂. A lower-tech version is possible but harder to carpet well.

What’s the difference between Iwagumi and the Nature Aquarium style?

Iwagumi is a minimalist, stone-only sub-style within the broader Nature Aquarium approach. Nature Aquarium layouts can include driftwood and a wider variety of plants. Iwagumi is rocks plus, typically, a single carpet.