WIO Boulder - Black Venom

Black Venom Boulder brings a striking, almost predatory presence to a layout - deep black stone marked with faint, acid-green mineral veining that catches the light like venom glinting beneath dark scales. Its aggressive, angular surfaces and jagged edges give it a raw, dangerous character unlike the smoother, weathered boulders in the WIO range.

Formed under the same intense geological pressures as its jagged Stone-format siblings, Black Venom Boulder is built for centerpiece placement. Set as a solitary anchor, its dark mass draws the eye immediately and holds it - ideal for high-contrast Iwagumi layouts, dramatic biotopes, or any scape built around a single commanding stone.

Despite its intense look, Black Venom Boulder doesn't disturb the delicate balance of your aquarium. It's a fully inert stone that won't affect water parameters, making it safe for planted tanks and sensitive livestock alike.

As a striking, high-demand stone, Black Venom Boulder is best suited to scapers looking to build a layout around one unmistakable focal point rather than blend it into a busy composition.

• Key Points

  -Deep black stone with faint acid-green mineral veining and sharp, angular surfaces

  -Ideal as a solitary centerpiece stone or the dominant anchor in an Iwagumi layout

  -High-contrast presence that reads dramatically against pale sand or light hardscape

  -Inert, does not affect water parameters

  -Safe for fish, shrimp, and sensitive aquatic plants

• Usage

  • It can be used in both aquatic and terrarium environments.
  • Rinse the boulder with water before use. Use a brush to clean it before introducing it into the aquarium.
  • Avoid placing the boulder directly on bare glass - it is heavy and sharp-edged. Place substrate or WIO LandForms first to help fix the exact position with more freedom.
  • Always secure the stone, especially if stacking hardscape on or around it - you can do so with WIO ScapeBound, as movement during maintenance could harm livestock or the aquarium.
  • Position it a few centimeters/inches away from the glass walls to make maintenance easier.
  • Safe for fish, shrimp, and other aquatic animals.

• Characteristics

  -Type: Natural inert boulder

  -Color: Deep black with faint acid-green mineral veining

  -Texture: Sharp, angular surfaces with jagged edges

  -Boulder size: Generally 4 to 12 inches, sold individually by weight

  -Water parameters: Inert stone, does not affect water chemistry

  -Packaging: 11 kg (24 lb) boulder box

  -Supply: Limited - a striking centerpiece stone, best used as a single focal point