WIO Nano Rocks - Black Venom

WIO Black Venom Nano Stone brings striking pitch-black drama, high contrast, and a maze-like glazed texture to nano scale — a vibrant igneous stone that transitions from dark grey when dry to vibrant pitch-black when submerged, perfectly sized for Iwagumi nano compositions and any layout seeking bold, dark impact.

Black Venom Nano Stone carries the same jagged, glazed character as the full-size Black Venom Stone — its maze-like texture creating an intriguing visual element that magnifies the green of plants and mosses with exceptional contrast. Even at nano scale the color transformation from dry to wet creates a dynamic, ever-changing visual element. Ideal for high-impact Iwagumi layouts and any nano design that requires a bold, dramatic focal point.

Sized between 3 and 10 cm, ideal for nano tanks under 40L. May raise pH and hardness slightly; regular water changes are enough to keep hardness under control. Pre-washed and ready to use.

Key Points

• Color: Dark grey dry; vibrant pitch-black when submerged
• Nano Scale: Sized 3–10 cm, ideal for tanks under 40L / 10 gal
• Jagged Glazed Texture: Angular forms with maze-like surface
• High Impact: Stunning contrast with green plants and pale substrates
• Pre-Washed: Clean and ready to use, no soaking required
• Water Chemistry: May raise pH and hardness slightly
• Versatile Use: Ideal for aquariums, terrariums, and paludariums
• Safe for fish, shrimp, and amphibians
• Pairing Tip: Combine with Heaven Sand for striking pale contrast

Characteristics

• Type: Igneous stone
• Color: Dark grey dry; vibrant pitch-black underwater
• Texture: Jagged with glazed maze-like surface
• Stone size: 3–10 cm
• Water Hardness: May raise pH and hardness slightly; regular water changes maintain stability

Availability at Cuboid Nature Aquarium

• 2 kg Bag: Assorted mix of stones, 3–10 cm

Usage

• Rinse briefly before use to remove any transport dust — pre-washed and ready for direct placement
• Use the most angular piece as the dark focal anchor; surround with supporting stones
• Place over substrate or WIO LandForms — avoid direct contact with glass
• Use WIO ScapeBound to secure if stacking or layering
• Control any alterations in pH and kH by regular water changes with osmotic or soft water
• Safe for fish, shrimps, and other aquatic animals

Available from Cuboid Nature Aquarium — Authorized Retailer for WIO.

Inventory Accuracy

If this item is at low stock, or you are ordering all or almost all of our current inventory, there may be an inventory discrepency. We will contact you about any issues as soon as possible.

Order Processing

  Please allow 24 to
48 hrs to process your order.  Expect an
email within 48 hrs to let you know your order is on your way.

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in Store” at checkout, an email will be sent when your order is ready for
pickup.  Orders can be picked up during
store hours, see our home page for our current hours.  The pick up address is 6637 Easton Rd,
Pipersville, PA 18947

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any, for your order will be calculated and displayed at checkout.