Ryuoh Boulder Nano Stone is a river-shaped of the traditional Ryuoh stone-one of aquascaping’s most recognizable and beloved materials. Naturally rounded and softened by water erosion, each piece features a deep grey base tone with flowing white veins and smooth mineral transitions. The surface is polished by nature, offering a tactile, organic presence that contrasts beautifully with plants and driftwood.

Sized between 3 and 10 cm, these boulders are ideal for tanks under 40 L, allowing you to build expressive, compact hardscapes with natural flow and rhythm. Their neutral composition ensures they won’t alter pH or water hardness, making them safe for all aquatic life, including shrimp.

Perfect for creating riverbeds, mountainous valleys, or soft terrarium hills, Ryuoh Boulder Nano Stone  adds subtle elegance and strength to any miniature landscape.

• Key Points

  • Color: Deep grey with white marbling and soft transitions
  • Nano Scale: Sized ≈ 3–10 cm, ideal for tanks under 40 L / 10 gal.
  • Boulder Shape: Naturally rounded and smoothed by water erosion
  • Organic Presence: Perfect for soft, flowing layouts
  • Pre-Washed: Clean and ready to use-no soaking required
  • Safe: Inert and harmless for shrimp, fish, and amphibians
  • Water Chemistry: Calcareous-may raise pH and hardness over time
  • Versatile Use: Aquascapes, terrariums, paludariums, bowls
  • Packaging: 2 kg(4.4lbs) bag with assorted pieces
  • Pairing Tip: Use with contrasting angular rocks or driftwood for visual tension. For natural stone transitions and intricate details, including stone slides, add WIO Accents Grey Chips.

• Usage

  • Preparation
    – Brief rinse to remove possible dust from transport.
    – Pre-washed-ready to place directly in your layout.
     
  • Placement Tips
    – Use larger boulders as anchors in your layout.
    – Cluster smaller pieces around roots or wood for natural transitions.
    – Best placed over substrate-not in direct contact with glass.
    – Ideal for river-themed tanks or as accents in mossy setups.
    – Use WIO ScapeGlue and FuseColor for secure positioning.
     
  • Layout Ideas
    – Riverbed scapes-Iwagumi.
    – Soft mountain scenes.
    – Minimalist terrarium centerpieces.
     
  • Maintenance Ideas
    – 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
   – This is a natural product-each stone is unique in shape, tone, and surface pattern. Variations are expected and embraced as part of its natural beauty.

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

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