Ryuoh Boulder Nano Stone Bags
Ryuoh Boulder Nano Stone brings the soft, water-shaped spirit of traditional Ryuoh into miniature form — rounded river stones smoothed by natural erosion, carrying the deep grey body tones and flowing white veins that make Ryuoh one of aquascaping’s most iconic materials. Their gentle contours and polished mineral transitions create a calm, organic presence that blends effortlessly with plants, roots, and driftwood.
Under directional light, the white marbling catches highlights while the rounded shadows deepen into smooth, sculpted valleys, giving a natural, river-carved chiaroscuro. Under diffused light, the boulders settle into a quiet, timeless gradient — ideal for riverbeds, soft iwagumi scenes, mossy forest floors, and terrarium hills where gentle flow and understated elegance matter more than sharp edges. Each piece carries the softness of true water erosion.
Compose as you would with classic nano stones: anchor your layout with the most rounded, character-rich boulder, then step down scale with supporting pieces to build natural transitions, flowing contours, and river-like rhythms. Ryuoh Boulder Nano Stone excels in diorama precision — cluster pieces around wood for organic joins, create natural slides using Grey Chips, or use them to soften angular hardscape elements. Their gentle presence brings balance and quiet strength to any miniature landscape.
Available Size
Nano Bag – 4.4 lb (2 kg)
Mixed stones approx. 1–4 in (3–10 cm)
Ideal for tanks under 10 gal (40 L)
Available per pound as well
Why You’ll Love It
✓ Deep grey stones with flowing white mineral veins
✓ Naturally rounded, water-eroded forms for soft, organic layouts
✓ Perfect for riverbeds, iwagumi, terrariums, and moss-focused scapes
✓ Pre-washed and ready to use
✓ Safe for fish, shrimp, amphibians, reptiles, and plants
✓ Works in aquariums, paludariums, terrariums, bowls, and nature dioramas
Details
Color: Deep grey with white marbling and soft mineral transitions
Stone Sizes: Nano mix 1–4 in (3–10 cm)
Texture: Smooth, water-polished surfaces with rounded edges
Composition: Natural calcareous stone (may raise pH/KH over time)
Matching: Driftwood, organic roots, soft plants, Grey Chips for transitions
Look & Feel: Calm, river-shaped presence with elegant, flowing forms
Chemistry: Calcareous — may gradually increase pH and hardness
Packaging: 4.4 lb (2 kg) bag with assorted rounded boulders
Setup & Care
Pre-wash: Brief rinse to remove transport dust; fully pre-washed
Placement: Use larger stones as anchors; place smaller pieces around wood or roots for natural transitions
Mixing: Best placed over substrate — avoid direct contact with glass
Planting: Ideal for mossy river themes, forest floors, and gentle iwagumi
Filling the Tank: Add water carefully to avoid displacing stones
Finishing: Start filtration; dust settles quickly
Water Chemistry: Monitor pH/KH in sensitive systems; soft water or regular changes maintain balance
Safe for all fish, shrimp, amphibians, reptiles, plants, and terrarium life.
