Color: Jet-black volcanic rock with natural tonal variation for dramatic contrast and depth.

Nano Scale: Sized approximately 3–10 cm, ideal for tanks under 40 L / 10 gal where precision and presence matter.

Volcanic Texture: Highly porous and jagged, with deep crevices that bring authentic ruggedness and realism to your scape.

Pre-Washed: Clean and ready to use straight from the bag — no soaking required.

Plant-Friendly: The porous surface provides excellent anchoring for moss, liverworts, and epiphytes, encouraging lush growth over time.

Safe: 100% natural, inert, and safe for fish, shrimp, and aquatic plants.

Water Chemistry: Neutral — does not alter pH or water hardness, ensuring long-term stability.

Versatile Use: Perfect for aquariums, terrariums, paludariums, and decorative bowls.

Packaging: 1.5 kg bag containing mixed-size stones for versatile layout creation.

Pairing Tip: Combine with WIO Heaven Sand or Druid Gravels to maximize contrast and visual impact. For smoother transitions and added detail, integrate WIO Accents Black Chips for a natural, cohesive look.

Darwin Black Nano Stone — volcanic elegance and bold simplicity for powerful nano aquascapes.

Fast and cheap in 2kg bags

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.