Okho Dragon Stone (also known as Ohko Stone or Dragon Rock) is a highly popular type of aquarium rock commonly used in aquascaping, especially in Iwagumi-style layouts.
It features a textured, layered surface with deep crevices and holes that resemble dragon scales—hence the name.
With its earthy brown to greenish tones and rugged appearance, it adds a dramatic and natural look to aquariums. Lightweight and easy to shape, it’s perfect for creating striking rock formations, caves, and focal points in planted tanks.
Okho Dragon Stone is aquarium-safe and inert, meaning it won’t alter water chemistry, making it ideal for both beginner and advanced aquascapers. It pairs beautifully with aquatic plants and mosses, which can grow in its natural grooves.
Appearance:
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Okho Dragon Stone features a rugged, weathered surface that resembles dragon scales, giving it an ancient look.
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Its coloration ranges from brownish to greenish-grey, often with natural crevices and holes.
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These textured grooves not only add visual interest but also help to anchor aquatic plants and mosses.
Aquascaping Benefits:
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Ideal for natural aquascapes (like Iwagumi or nature-style layouts).
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Creates striking focal points and depth due to its irregular, layered structure.
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Lightweight compared to other rocks, making it easier to arrange and stack safely.
Aquarium Safety:
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Inert and aquarium-safe – does not significantly alter water parameters (pH or hardness).
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Before placing in the tank, it’s recommended to rinse and scrub to remove surface dirt and debris.
Additional Tips:
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Soaking the stones before placement can help release trapped air and make positioning easier underwater.
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Pair well with fine gravel or sand substrates and low-growing plants like Hemianthus callitrichoides (dwarf baby tears), Eleocharis (hairgrass), or mosses.
