Our Black Venom gravel is perfect for combining with our Black Venom Boulders or to use as a standalone substrate. The dark grey, smooth surfaces of these river stones provide gentle contrast and texture when combined with plants and other hardscapes and would look particularly effective when used as detail around plants such as Anubias. They are also ideal for creating ‘stream biotopes’!

• Size mix from 3-40mm
• Does not affect water hardness