Black Lava Rock
Black Lava Rock is a porous aquascaping stone that is widely used for planted as well as African Cichlid tanks. This lightweight stone can range from a dark black to reddish-brown coloration. The porosity makes it suitable for use as aquarium filtration as the tiny holes provide surface area for beneficial bacteria to colonize.
Check out the Skull Island themed aquascape we did using Black Lava Rock