Rivulet Riverbed is inspired by the natural beauty of Yakushima Island in Japan — a UNESCO World Heritage Site renowned for its ancient cedar forests, crystal-clear mountain streams, and breathtaking biodiversity. This carefully curated substrate showcases the balance and harmony found in wild habitats, recreating the organic forest-floor riverbed character of Japan's most pristine natural landscapes.

Rivulet is a rich, multi-textured blend combining warm sandy substrate with natural dried leaves, fine twigs and roots, small rounded river pebbles, and tiny shell fragments — all the organic elements that accumulate naturally on the beds of Yakushima's forest streams. The mix creates a deeply natural, earthy character that is full of detail and biological interest, providing not only visual authenticity but also beneficial surface area for microorganism colonization and natural tannin release from the leaf matter.

This substrate is ideal for creating a pleasant, harmonious, and calming biotope environment — particularly suited for nano fish, shrimp, and other species from Japanese forest stream habitats.

Key Points

• Color: Warm sandy beige base enriched with dried red and green leaves, fine twigs, and natural organic elements
• Composition: A natural blend of fine sand, dried leaf matter, small roots, rounded river pebbles, and tiny shell fragments
• Biotope Authentic: Inspired by the forest stream habitats of Yakushima Island, Japan
• Matching: Complements Elderly Stone and natural driftwood elements for a complete Japanese forest stream biotope
• Results: Creates a deeply natural, organic stream-floor environment with genuine biotope character
• Ready to Use: Pre-washed — minimal rinsing required
• Safety: Safe for all inhabitants — fish, shrimp, and more; leaf matter releases natural tannins
• Water Hardness: Essentially inert — leaf tannins may gently soften water over time
• Versatile: Perfect for aquariums and paludariums; ideal for nano tanks, shrimp setups, and Japanese biotopes
• Packaging: Available in 2 kg bags

Usage

• Pre-washed: Ready to use, though additional rinsing can be done to ensure cleanliness
• Riverbed Placement: Spread the substrate evenly along the bottom of your empty tank or terrarium; pour gently from a low height to avoid scratching the aquarium glass
• Standalone or Mixed: Use on its own for a natural base, or combine with other WIO sands and gravels for a custom substrate look
• Decorate & Plant: Arrange rocks, driftwood, and plants to create a harmonious and captivating environment
• Filling the Tank: Pour water carefully, avoiding direct flow onto the substrate — Pro Tip: pour over a plate or décor to minimize disturbance
• Final Touch: Use a net to skim any floating particles, then turn on the filter and watch the remaining cloudiness disappear within a few hours, leaving a clear, natural finish
• Easy Maintenance: With every water change, gently vacuum the substrate to remove any accumulated debris or algae

Available from Cuboid Nature Aquarium — Authorized Retailer for WIO.