Black Seiryu Stone Aquarium Rock 5–30cm | Dark Aquascaping Stone (Per lb)

Create bold, high-contrast aquascapes with Black Seiryu Stone, an acid-washed version of traditional Seiryu that features a deeper, darker tone with reduced white veining. This premium stone offers a cleaner, more modern look while maintaining the sharp textures and structure that Seiryu is known for.

With pieces ranging from 5–30cm, it’s ideal for building detailed layouts, strong focal points, and layered hardscapes.

Why Choose Black Seiryu Stone?

• Acid-washed finish for a darker, more uniform appearance
• Reduced white veining for a cleaner, modern look
• Sharp, textured surface creates dramatic layouts
• Ideal for stacking and structured aquascapes
• Premium alternative to traditional Seiryu Stone

What Makes It Different?

Black Seiryu is acid treated to darken the stone and reduce the bright white calcium veins found in regular Seiryu. This results in a more consistent color and a stronger visual contrast in aquascapes.

Important Note

• Contains calcium carbonate and may raise pH and hardness over time
• Acid washing reduces surface residue but does not eliminate mineral content
• Recommended for aquascapers familiar with water parameter impact

Perfect For

• High-contrast aquascaping layouts
• Iwagumi and structured designs
• Planted aquariums
• Freshwater fish and shrimp tanks (monitor parameters)
• Terrariums and hardscape builds

Stone Details

• Type: Acid-treated Seiryu Stone
• Color: Dark grey to black
• Size: 5–30cm pieces
• Texture: Sharp, layered, and rugged
• Water impact: May raise pH and hardness
• Preparation: Rinse thoroughly before use

Available Sizes

Sold per lb:
• 1 lb, 5 lb, 10 lb, 25 lb, 50 lb

Each order includes a mix of shapes and sizes within the 5–30cm range.

🔥 Best Value: The 50 lb box offers the lowest cost per pound and is ideal for full aquascaping setups.

Custom Requests

Looking for specific shapes or layout pieces? Send us a message and we’ll do our best to hand-select stones for your setup.

Shipping & Natural Variation

Each piece is natural and unique. Shape, size, and color will vary slightly from order to order.