WIO - Darwin Black Lava Stone

A jet-black volcanic rock with rugged texture and natural crevices, perfect for adding dramatic contrast and structure to aquascapes and terrariums. Its highly porous surface supports beneficial bacteria, mosses, and epiphytes, creating a healthy, visually striking environment for all aquatic life.

Darwin Black Lava Stone Per Pound 3.3 lb Nano Bag 26lb Mega Kit

$9.95

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100% natural aquascaping rock

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Details

Stone Type: Igneous

Available Sizes:
Mega Box – 26 lb (12 kg) – Ideal for 2'–4' (60–120 cm) aquariums
Nano Bags – 3.3 lb (1.5 kg) – Smaller pieces for nano tanks
Available per pound as well

Color: Jet-black to charcoal

Texture: Highly textured with natural volcanic crevices

Size Range: 1" to 12" depending on kit

Effect on Water: Inert — does not harden water

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FAQ

Q: What is WIO Darwin Black Lava Stone used for?
A: Darwin Black Lava Stone is a natural volcanic rock used to build aquascapes, planted aquariums, terrariums, and other natural-style layouts.

Q: What does Darwin Black Lava Stone look like?
A: It is a deep black to charcoal-coloured stone with a rugged surface and natural volcanic crevices. Its dark colour creates strong contrast with plants and driftwood.

Q: What type of rock is Darwin Black Lava Stone?
A: Darwin Black Lava Stone is an igneous volcanic rock formed from lava.

Q: Is Darwin Black Lava Stone safe for aquariums?
A: Yes. It is suitable for aquariums and is safe to use with fish, shrimp, and aquatic plants.

Q: Does Darwin Black Lava Stone affect water parameters?
A: No. Darwin Black Lava Stone is inert, meaning it does not harden the water or change the pH.

Q: Is Darwin Black Lava Stone porous?
A: Yes. Its highly porous surface provides plenty of small spaces where beneficial bacteria can colonise.

Q: Can I attach plants to Darwin Black Lava Stone?
A: Yes. The rough, porous surface is well suited to attaching mosses, ferns, and other epiphytic plants.

Q: Can I use Darwin Black Lava Stone with driftwood?
A: Yes. The dark volcanic stone works particularly well with driftwood and can be used to create natural ryoboku-style aquascapes.

Q: Is Darwin Black Lava Stone suitable for nano aquariums?
A: Yes. The 3.3 lb (1.5 kg) Nano Bag contains smaller pieces that are better suited to nano-sized aquariums.

Q: How do I prepare Darwin Black Lava Stone before using it?
A: Rinse the stones thoroughly and brush away any loose fragments before placing them in your aquarium or terrarium.

Q: How should I place Darwin Black Lava Stone in my aquarium?
A: Place the stones securely on the substrate or a suitable hardscape base. When stacking multiple pieces, make sure the structure is stable.

Q: Should I leave space between the rocks and aquarium glass?
A: Yes. Leaving a small gap makes it easier to clean around the hardscape and maintain the aquarium.

Q: Why choose WIO Darwin Black Lava Stone?
A: Darwin Black Lava Stone combines a dramatic black colour with a rugged, highly porous texture. It provides structure for aquascapes, creates excellent contrast with plants and wood, and remains inert in the aquarium.

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100% natural aquascaping rock
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Bold structure. Natural texture. Deep contrast.

WIO Darwin Black Lava Stone is a jet-black volcanic rock with rugged texture, deep crevices and a naturally porous surface.

Its dark colour creates powerful contrast against green plants and lighter substrates, while its irregular shape gives you the structure needed to build convincing natural landscapes. Whether you are creating a planted aquarium, a dramatic hardscape or a terrarium, Darwin Black Lava brings depth and character without overpowering the rest of the layout.

WIO Darwin Black Lava Stone

Built for natural-looking hardscape

The beauty of Darwin Black Lava is in its texture. Natural volcanic crevices and uneven surfaces create shadows and highlights throughout the layout, making the hardscape feel more complex and established.

Use larger pieces as the structural foundation of an aquascape, then use smaller stones to fill gaps, build transitions and create a more natural sense of scale.

It also pairs exceptionally well with driftwood, making it a strong choice for Ryoboku-style layouts where dark rock and wood work together to create a bold, nature-inspired composition.

A surface plants can use

Darwin Black Lava is highly porous, giving beneficial bacteria plenty of surface area for colonisation. Its textured surface also provides excellent attachment points for mosses, ferns and other epiphytic plants.

Over time, plants can become integrated into the stone rather than simply sitting around it, helping the hardscape develop a more natural appearance.

From nano tanks to large layouts

Darwin Black Lava is available in individual pieces as well as smaller nano bags and larger box sets, making it easy to scale the stone to your aquarium.

The stone ranges from approximately 1–12 inches (2.5–30 cm) depending on the selected format, allowing it to work as everything from detailed nano-tank hardscape to the major structural rock in larger aquariums.

Simple, predictable and inert

Darwin Black Lava is an igneous volcanic rock and is inert in the aquarium. It does not harden water or alter pH, making it a straightforward hardscape choice when you want to control your water chemistry independently of your stone.

Darwin Black Lava is the stone to build around — dark, rugged, porous and incredibly versatile.