Spiderwood M70 in-line diffusor XL Black Lava are lava

XL Black Lava are lava stones of at least 1

sometimes with a red vein

And this for half the price of other brands with similar products

Want to learn more about the benefits of CO2 in your aquarium

Spiderwood M70 in-line diffusor XL Black Lava are lavaSpiderwood is a light coloured type of wood often used in hardscapes. Due to its irregular shapes and unique pieces, spiderwood is extremely suitable in combination with stones. When Spiderwood is placed in an aquarium, fungi can develop, caused by bacteria in the wood. This results in an oily substance or a white slime layer. This will disappear after a few weeks. Our advice is to always thoroughly soak the wood first and regularly change the water.