Dragon Stone Aquarium Rock

What is Dragon Stone Rock? Dragon Stone, also known as Ohko Stone, is a unique type of aquarium rock characterized by its uneven, rippled surface that resembles a dragon’s scales. Scientifically known as weathered granite or rhyolite stone, it has a distinctive greenish-brown color with shades of red, black, grey, and yellow mixed throughout.

The porous and pitted texture of Dragon Stone creates the illusion of scales, giving it a prehistoric, dragon-like appearance. It often features interesting natural shapes and formations with ridges, cracks, and crevices that make each piece unique.

Dragon Stone is primarily valued in the aquascaping community for its ability to develop algae growth and promote beneficial bacteria colonies quickly. Its complex topography and texture provide endless options for aquascaping designs.

Where is Dragon Stone Rock Found?

The exact origins of Dragon Stone are unknown, but it’s believed to be found in mountainous regions of China. Highly coveted by collectors, the locations where it occurs naturally are often kept secret.

Responsible sourcing of Dragon Stone is essential to prevent damage to natural habitats. Always look for providers who ethically collect their stones without disturbing local ecosystems. Farm-raised or commercially produced Dragon Stone is a sustainable alternative.

While the main source is China, similar looking weathered granite stones are also found in parts of Japan, Taiwan, and Indonesia. However, the Chinese Dragon Stone remains the most popular type used in aquarium rockscapes.

Dragon Stone Aquarium Benefits

Dragon Stone provides several unique benefits when used as an aquarium rock:

  • Promotes beneficial bacteria – The highly porous surface area encourages growth of helpful nitrifying bacteria that establish the nitrogen cycle.
  • Algae growth – Dragon Stone quickens the development of algae, speeding up the maturation of a new tank.
  • Hiding places – All the nooks and crannies provide perfect hiding spots for shy fish and invertebrates.
  • Rooting spaces – The cracks and holes allow plant roots to anchor and grip onto the rock.
  • Aesthetic appeal – The dramatic shapes and textures create an eye-catching focal point.

With its natural ridges, edges, and pits, Dragon Stone is ideal for anchoring moss, ferns, buce, and anubias. The intricate texture and neutral earthy tones help mimic a natural biotope aquascape.

Is Dragon Stone Good for Planted Aquariums?

Dragon Stone is an excellent choice for planted aquariums and works well in layouts like Iwagumi-style aquascapes. The weathered and porous rock allows water to flow through it, circulating nutrients to plant roots while preventing stagnation.

The rough surfaces give plants plenty of footing to grip onto. By wedging plants into crevices and holes, Dragon Stone can securely hold stems, mosses, and epiphytes in place without needing to attach them to hardscape with string or glue. This creates a seamless look.

Dragon Stone also helps regulate pH levels through its natural buffering capacities. This minimizes drastic pH fluctuations that can stress aquarium plants. For these reasons, it is one of the most common rocks used in planted aquascaping.

Dragon Stone Aquarium Rock Price

Dragon Stone is considered a specialty aquascaping rock so it tends to be more expensive than common types like lava rock. Prices are generally determined by:

  • Size of stones – The larger and more intricate the formation, the higher the price. Small starter kits tend to be cheaper.
  • Weight – Sold by the pound, heavier individual stones or kits cost more.
  • Quality – Premium pieces with more interesting shapes, high porosity, and defined scale-like textures have a higher value.
  • Brand – There can be pricing differences between specialty aquascaping brands.

To give an idea, a high-quality 15-20 lb kit suitable for a 60-75 gallon aquarium may cost $60-100. Larger 60-80lb kits for bigger tanks can range from $200-300. Rare collector pieces may be priced even higher.

Dragon Stone Aquarium Rock Size

Dragon Stone kits contain a variety of sizes ranging from small fragments to extra large statement pieces:

  • Small – 1 to 3 inches in size and 0.5 to 2 lbs. Add detail and scale transitions.
  • Medium – 3 to 5 inches and 2 to 6 lbs. Create rock piles and supplement larger stones.
  • Large – 5 to 8 inches and 6 to 11 lbs. Form main rock structures and landmasses.
  • Extra Large – Over 8 inches and 11+ lbs. Dramatic focal point stones.

Having a range of sizes allows you to construct layered dimensions and perspective in your aquascape layout. The smaller pieces can be used to fill gaps and create a natural look.

Dragon Stone Aquarium Setup

Properly preparing and arranging Dragon Stone in a new aquarium setup involves some key steps:

  1. Thoroughly rinse each rock under running water to remove debris and dust.
  2. Further clean by scrubbing with an old toothbrush if needed to dislodge any dirt in crevices.
  3. Boil, soak, or bleach stones if wanting to sterilize and remove organics.
  4. Plan rock structure and layout outside of tank for easier construction.
  5. Place larger backdrop rocks first, then build up layers using smaller pieces.
  6. Ensure stability by burying part of rocks into the substrate.
  7. Fill any gaps between stones with smaller fragments for a natural transition.

Take your time during the setup process. Dragon Stone layouts often look best when stones group in asymmetric piles or trail off to create depth and perspective.

Dragon Stone Aquascape Ideas

From nano tanks to massive custom setups, Dragon Stone is versatile enough to work in any size or style aquascape:

  • Iwagumi Layouts – Typically involve a minimalist design of Dragon Stones balanced with low carpeting plants.
  • Nature Aquariums – Stones are arranged to mimic natural biotopes and blended with lush plant growth.
  • Dutch Style – Smaller Dragon Stone accents can complement the manicured look of a Dutch planted tank.
  • Wabi-Kusa – Mini aquascapes using Dragon Stones combined with specialty plants like moss and ferns.
  • Paludariums -Creates the elevation and terrain for transition zones in ripariums and terrariums.

Browse online galleries or aquascaping contests to discover new ideas and inspirations for your next Dragon Stone aquascape.

Is Dragon Rock Good for Aquariums?

Yes, Dragon Stone is considered one of the best and most versatile types of aquarium rock. Key benefits include:

  • Does not affect water chemistry – It has a neutral pH and will not alter water parameters.
  • Completely inert – Dragon Stone does not leach any substances, metals, or minerals into the water.
  • Extremely durable – Can withstand wear and tear from fish, plants, and routine maintenance.
  • Long-lasting stability – Maintains its shape and structure without fracturing or crumbling.

Thanks to these qualities, Dragon Stone is suitable for all freshwater and saltwater aquarium setups. It provides the ideal base rock for beginners and experts alike.

Is Dragon Stone Safe for Aquariums?

Dragon Stone is considered very safe and aquarium-friendly:

  • It won’t increase water hardness or affect pH.
  • Does not leach harmful chemicals into the water.
  • Provides additional beneficial bacteria.
  • Offers plenty of fish-safe hiding spots.
  • Won’t injure fish with rough surfaces or sharp edges.

Before use, properly prep Dragon Stone by boiling, pressure washing, or bleaching to remove organic matter and sterilize. Test each new stone in a bucket for a few weeks to verify water safety. With responsible sourcing and preparation, Dragon Stone poses no risks.

Using Dragon Stone in Aquariums

To maximize both the aesthetics and functionality of Dragon Stone:

  • Select stones with distinct textures, interesting shapes, and a range of sizes.
  • Group or pile stones together rather than spacing them evenly apart.
  • Angle stones to create depth and layers within the hardscape.
  • Bury part of larger rocks into the substrate for stability.
  • Arrange stones to leave planting pockets and open areas.
  • Use stone edges to neatly border and define different planting zones.

Taking the time to plan the layout and positioning of the Dragon Stones thoughtfully is key to fully utilizing their potential in your aquarium.

What Does Dragon Stone Do in Aquariums?

In addition to looking beautiful, Dragon Stone provides some important functions:

  • The porous surface encourages growth of helpful nitrifying bacteria that establish the nitrogen cycle in new tanks.
  • It quickens the growth of brown algae, speeding up the maturation process.
  • Ripples and cavities provide endless hiding spots for shy fish and invertebrates.
  • The notches allow plant roots something to tightly anchor onto for stability.
  • Its neutral rock buffers water chemistry, especially helpful for soft water setups.
  • The scale-like textures and interesting shapes become an eye-catching focal point.
  • Natural ridges give the option to attach moss, ferns, anubias, and bucephalandra with gel or string.
  • Smaller stones can be used to fill gaps, creating a seamless transition from the hardscape to the planted areas.

With both form and function, Dragon Stone enhances aquarium health while also creating an intriguing aesthetic impact.

Where to Find Dragon Stone in Nature

While Dragon Stone origins remain elusive, similar looking stones can sometimes be found naturally near:

  • Granite formations and quarries.
  • Rocky cliffs, overhangs, and plateaus.
  • Mountain streams and riverbeds.
  • Areas with volcanic activity.
  • Old lava flows.
  • Eroded granite shorelines.

Always check local regulations before removing any stones from public lands. Sourcing Dragon Stone sustainably helps preserve its limited natural habitat.

Dragon Stone Crystal

Unrelated to aquarium Dragon Stone but sharing a name, Dragon Stone crystal is a type of obsidian used for its metaphysical properties. Often sold as polished spheres, it is said to enhance creativity, courage, and self-confidence.

With its connection to the grounding energy of the Earth, Dragon Stone crystal complements the stabilizing nature of aquarium Dragon Stone rock. Both encapsulate the raw beauty and wonder of the natural world.


With its rugged ridges, variegated colors, and textured landscape, Dragon Stone is a dramatic way to bring a slice of wild nature into your aquarium. More than just a decorative addition, it provides real benefits for fish, plants, and tank ecology. Sourced responsibly, Dragon Stone is one of the most compelling and multi-functional rocks available to aquarists and aquascaping enthusiasts. Allow your imagination to run wild – Dragon Stone makes the perfect starting point for creating your aquatic masterpiece.