WIO Stone Sets Black Venom Boulder

WIO Stone Sets Black Venom Boulder

  • Harmonic stone set
  • Vibrant pitch-black colour
  • Ideal for ryoboku style aquascapes
  • May raise pH and hardness slightly
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The Black Venom Boulder stone sets from the WIO brand consist of a combination of different rounded stones in a deep black. It has the same stunningly vibrant pitch black colour and smooth black glazed surface as the Black Venom Stone. The difference lies in its beautifully rounded surface, which mimics the shape of timeless boulders sculpted by the forces of nature. Boulders have the natural shape of a stone polished by erosion and weathering.

Black Venom Boulder is a great choice to complement Ryoboku layouts. It adds depth to an aquarium or terrarium and provides a stunning contrast that enhances the green of aquatic plants and mosses. Its maze-like texture makes it an eye-catching stone that can be used to create stunning designs.
To achieve an effective composition, you can mix and match Black Venom Nano Boulders and gravel with Heaven Sand. This creates a fascinating effect that makes an aquarium or terrarium look unique.

A set always consists of different sized stones and small pieces of stone to create a charming landscape with depth effect. This rock can slightly increase the pH value and the hardness. Regular water changes are sufficient to keep the hardness under control.


  • Fascinating black stone with a rounded surface
  • Ideal for aquascapes in Ryoboku layout
  • Has a smooth black-glazed structure with labyrinth-like texture
  • May slightly increase the pH value and hardness
  • Dark grey and luminous pitch black under water


These Rocks sets are untreated natural products. They can be used in aquariums as well as in terrariums. It is recommended to clean and rinse Rocks decoration under running water before using it in the aquarium. This removes the finest stagnant particles, which can otherwise cause cloudiness when a new aquarium is set up. Slight residues of moss or lichen cannot be ruled out completely.
The sets are already compiled before they reach Aquasabi, so they can not be opened or altered.

Features of the Sets

WIO Stone Sets Black Venom Boulder - 60 cm Set
Aquarium Size Up to 60 cm length
Main stone approx. 20 cm
Weitere Steine Medium-sized stones approx. 5 - 16 cm, various Nano Rocks
Weight approx. 10 kg
WIO Stone Sets Black Venom Boulder - 120 cm Mega Set
Aquarium Size Between 80 - 120 cm length
Main stone approx. 25 cm
Weitere Steine Medium-sized stones approx. 5 - 20 cm, various Nano Rocks
Weight approx. 20 kg



WIO's products aim to bring nature into people's daily lives.
WIO designs and delivers products that enable customers to create small to medium sized natural landscapes that stimulate them, reconnect them with nature, and at the same time improve their well-being. Their team of designers, makers and natural artisans create unique products that allow people to fully enjoy nature in their daily lives. The products are designed for the most demanding customers with a special sensitivity to nature, well-being, ecology, design, art and excellence.

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