Black Ryuoh Stone is the midnight counterpart to classic Ryuoh, graphite-black limestone slashed with vivid white quartz lines. One piece changes the room: edges harden, veins blaze, and shadows pool deep, giving you instant cliff energy and a true Iwagumi presence from the first placement.

The geology reads with authority. Fractured planes, stepped ridges, and tight clefts create vertical micro-relief that catches directional light in razor highlights while holding shadow for scale. Wet, the blacks deepen and the veining pops; dry, the stone settles to a satin charcoal, always high contrast, never messy.

Compose with lines-of-force. Seat the tallest ridge slightly off-axis to set motion, then echo its fracture angles with supporting stones to build buttes, saddles, and talus. Keep negative corridors where “water would move” so the layout breathes. Raking side-light carves decisive silhouettes; softer top-light turns the scene cinematic without glare.

Black Ryuoh loves deliberate pairing. Pale sands make the veins sing; dark substrates deliver tone-on-tone drama. Driftwood adds organic counter-lines; fine-leaf plants and moss cool the tension while keeping edges legible. For seamless transitions from monolith to scree, veil bases with WIO Accents Dark Grey Chips and sprinkle micro-fragments to extend veining into the foreground. Use WIO PlantGlue to seat epiphytes into crevices without softening those crisp breaks.

As a calcareous limestone, Black Ryuoh can gently raise pH and hardness over time, part of its authentic mineral signature. Regular soft-water changes or buffering keep parameters steady for sensitive livestock; in alkaline-leaning biotopes, the stone feels right at home. The payoff is unmistakable: towering, high-contrast cliffs that look intentional from every angle and photograph like a dream.

• Key Points

  • Color: Deep graphite-black with vivid white quartz veins.
  • KIT Stone Sizes: Nano 3–16 cm; Box 3–20 cm; Mega 3–25 cm (typical mix).
  • Texture: Jagged ridges, rugged cuts, high micro-relief.
  • Composition: Natural limestone (calcareous) with quartz veining.
  • Matching: Pairs with WIO Dark Grey Chips; contrasts beautifully with driftwood.
  • Results: Monumental cliffs, high tension, sculptural Iwagumi presence.
  • Ready to Use: Pre-washed; a quick rinse is optional to clear transit dust.
  • Water Chemistry: Calcareous, may raise pH and hardness over time.
  • Safety: Safe for fish, shrimp, and plants when parameters are managed.
  • Versatile: Ideal for aquariums, paludariums, and terrariums.
  • Packaging: Stone Boxes, Nano 5 kg (≤45 cm), Box 11 kg (≤60 cm), Mega 21 kg (≤90 cm). Combine Box + Mega≈120 cm; 2× Mega ≈150 cm. Typical main stone: ~12–15 cm (Nano), 15–20 cm (Box), 17–25 cm (Mega).
  • Origin: Asia; selected and packed by WIO.
  • Care Level: Easy → Intermediate (due to mineral activity).
  • Why choose this: Choose Black Ryuoh for iconic black-and-white contrast and jagged structure when you’re comfortable managing mineral hardness.

• Usage

  • Pre-wash: Ready to use; brief rinse improves initial clarity.
  • Placement: Seat the tallest ridge first; angle faces to catch light and define flow.
  • Standalone or Mixed: Use alone or add Accents Dark Grey Chips for talus and slides.
  • Decorate & Plant: Contrast sharp edges with fine plants/moss; use WIO PlantGlue for epiphytes.
  • Filling the Tank: Add water gently; Pro Tip: pour over a plate or décor to protect contours.
  • Final Touch: Skim fines; start filtration; light haze clears within hours.
  • Water Parameters (Calcareous): Monitor pH/kH; consider regular changes with osmotic/soft water or WIO water treatments.

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