WIO Black Ryuoh Nano Stone brings graphite drama, vivid mineral veining, and razor-sharp mountain character to nano scale — graphite-black calcareous limestone slashed with vivid white quartz lines, perfectly sized for high-contrast Iwagumi compositions in tanks under 40L.

Black Ryuoh Nano Stone carries the same intense visual character as the full-size Black Ryuoh — fractured planes of graphite-black limestone with blazing white quartz veins that pop with extraordinary contrast. Even at nano scale, a single piece changes the scene: edges harden, veins blaze, and shadows pool deep. Wet, the blacks deepen and the veining intensifies; dry, the stone settles to a satin charcoal — always high contrast, never messy.

Sized between 3 and 10 cm, ideal for nano tanks under 40L. As a calcareous limestone, Black Ryuoh may gently raise pH and hardness over time; routine water changes keep parameters steady. Pre-washed and ready to use.

Key Points

• Color: Graphite-black with vivid white quartz veins
• Nano Scale: Sized 3–10 cm, ideal for tanks under 40L / 10 gal
• High Contrast: Vivid white veining blazes against graphite-black body
• Ideal for Iwagumi, cliff, and mountain-style nano aquascapes
• Pre-Washed: Clean and ready to use, no soaking required
• Water Chemistry: Calcareous — may gently raise pH and hardness over time
• Versatile Use: Ideal for aquariums, terrariums, and paludariums
• Safe for fish, shrimp, and sensitive species

Characteristics

• Type: Calcareous limestone
• Color: Graphite-black with vivid white quartz veins
• Texture: Fractured planes with sharp edges and deep clefts
• Stone size: 3–10 cm
• Water Hardness: Calcareous — may gently raise pH and hardness; 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
• Seat the tallest piece slightly off-axis; echo its fracture angles with supporting stones
• Place over substrate or WIO LandForms — avoid direct contact with glass
• Use WIO ScapeBound to secure if stacking or layering
• Pair with pale sands to make the veins sing; use dark substrates for tone-on-tone drama
• 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.