MAGIC VOLCANO ROCK/BLACK - MEDIUM / 18-23CM / BOX

Black lava is of volcanic origin, and has a porous texture, which makes it very lightweight and versatile. Due to its relatively low weight, it is possible to create large structures with it. Plants such as ferns or mosses can be attached and their roots will find a good foothold due to the porous structure of the stone. As an advantage, no Black Lava increases the hardness of tank water.