Black Lava Rock (Fuji Stone) / Planted Aquarium / Decoration/Hardscape/Aquarium

This stone does not raise pH or GH, depending on the amount added per gallon of water. Mix: 1" - 12" in length. Large: 9" - 12" in length. Small: 3" - 6" in length. XS: 2" - 3" in length.