Ryuoh Nano Stone is a scaled-down version of the legendary Ryuoh Stone, revered in aquascaping for its dramatic structure and expressive texture. Named after the mythical Dragon King (“Ryu-oh” in Japanese), this limestone features sharp ridges, deep cuts, and a layered grey palette that recalls ancient mountain cliffs sculpted by time.

Its natural surface complexity and pale veins offer contrast and visual tension, making it ideal for bold compositions in nano tanks under 40 L. Whether used as a standalone layout in an Iwagumi design or as an accent in larger hardscapes, Ryuoh Nano Stone brings a sense of monumentality in miniature.

Pre-washed, it’s safe for all livestock and aquatic plants. Its dramatic form adds height, character, and timeless geological elegance to both aquatic and terrestrial nature creations.

• Key Points

  • Color: Layered grey stone with subtle beige and white mineral veins
  • Nano Scale: Sized ≈ 3–10 cm, ideal for tanks under 40 L / 10 gal.
  • Mountain Character: Rugged cuts, sharp angles, and vertical texture
  • Pre-Washed: Clean and ready to use, no soaking required
  • Sculptural Form: Natural erosion and cracks add depth and realism
  • Safe: Safe for fish, shrimp, and other aquatic animals
  • Water Chemistry: Calcareous-may raise hardness over time
  • Versatile Use: Suitable for aquariums, terrariums, paludariums, and bowls
  • Packaging: 2 kg (4.4lbs) bag with mixed-size stones
  • Pairing Tip: Combine with WIO Ryuoh Stone or Boulder Kits for cohesive layering. For natural stone transitions and intricate details, including stone slides, add WIO Accents Grey Chips.

• Usage

  • Preparation
    – Rinse briefly to remove any transport dust.
    – No soaking required pre-washed and dust-free.
     
  • Placement Tips
    – Start with key vertical or angular pieces to establish structure.
    – Use substrate or WIO LandForms to anchor placement-avoid direct glass contact.
    – Leave margin near tank walls for maintenance.
    – Use WIO ScapeGlue and FuseColor to fix stone stacks and reinforce focal points.
     
  • Layout Ideas
    – Ideal for Iwagumi layouts with high-relief contrast.
    – Combine with moss or sand to soften bold edges.
    – Use as sculptural accent pieces in larger rock gardens or dry scapes.
    
     Maintenance Idea
    – During cleaning, gently use WIO cleaning tools to lift any debris from stone surfaces.
    – Control any alterations in pH and kH by regular water changes with osmotic or soft water, or by using WIO water treatments.
     

  Notes
  – Each bag contains a unique mix-expect natural variation in form, tone, and erosion marks.
  – May slightly increase water hardness in soft water systems-monitor parameters in sensitive setups.

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.

Store Pickup

  If you choose “Pickup
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

Domestic Shipping Rates

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