Ryuoh 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 SizeNano 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 DetailsColor: Deep grey with white marbling and soft mineral transitionsStone Sizes: Nano mix 1–4 in (3–10 cm)Texture: Smooth, water-polished surfaces with rounded edgesComposition: Natural calcareous stone (may raise pH/KH over time)Matching: Driftwood, organic roots, soft plants, Grey Chips for transitionsLook & Feel: Calm, river-shaped presence with elegant, flowing formsChemistry: Calcareous — may gradually increase pH and hardnessPackaging: 4.4 lb (2 kg) bag with assorted rounded boulders Setup & CarePre-wash: Brief rinse to remove transport dust; fully pre-washedPlacement: Use larger stones as anchors; place smaller pieces around wood or roots for natural transitionsMixing: Best placed over substrate — avoid direct contact with glassPlanting: Ideal for mossy river themes, forest floors, and gentle iwagumiFilling the Tank: Add water carefully to avoid displacing stonesFinishing: Start filtration; dust settles quicklyWater 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.
