Black Ryuoh Stone Boxes
Black Ryuoh Stone is the bold, graphite-black evolution of classic Ryuoh — a dramatic limestone defined by crisp white quartz veins, fractured planes, and deep architectural ridges. Its shadow-catching crevices create instant depth and striking structure, making it one of the most cinematic hardscape stones available. Dry, it shows a refined charcoal sheen; underwater, it transforms into a rich, jet-black centerpiece stone.
Available Sizes
Mega Box – 46 lb (21 kg)
Nano Bags – 4.4 lb (2 kg)
Available per pound as well
Each Box Includes
Nano: Stones from 1"–6" (2.5–15 cm)
Mega: Stones from 1"–10" (2.5–25 cm)
Packaging
Nano – 4.4 lb (2 kg) – For tanks up to ≤18" (≤45 cm)
Mega – 46 lb (21 kg) – For tanks up to ≤36" (≤ 90 cm)
Why You’ll Love It
✓ Graphite-black coloration with crisp white quartz veining
✓ Jagged, architectural planes ideal for Iwagumi and peak-style scapes
✓ Turns deep jet-black underwater for dramatic contrast
✓ Perfect for cliffs, ridgelines, layered formations, and bold compositions
✓ Naturally calcareous — may gently increase hardness
✓ Fully safe for all livestock when parameters are monitored
Design Tip
Pair Black Ryuoh with Heaven Sand for cinematic black-and-white contrast, or use darker substrates for sleek monochrome scapes. Add Dark Grey Nature Chips around the base for professional seamless transitions.
Specs & Care
Stone Type: Calcareous limestone
Color: Charcoal when dry; jet-black underwater with white quartz veins
Texture: Fractured planes, stepped ridges, natural crevices
Size Range: 1"–10" (2.5–25 cm) depending on box
Effect on Water: May slightly raise pH and hardness
Rinse thoroughly before use. Place stones on substrate or LandForms to protect glass. Secure stacked pieces with ScapeBound adhesive. Leave space from glass for easier long-term maintenance.
Safe for all fish, shrimp, plants, and terrarium animals with routine water-parameter stability.
