Estes Carved Lava Rock
An all natural lava rock for your aquarium that has been carved with holes to functionally provides perches and hiding places for your fish, but also decorate your tank. Safe for both marine and freshwater aquariums; it will not buffer pH.
As it is a completely natural rock, the item you receive may not be identical to the rock shown in the photo. Small size is 1.5 pounds, medium size is 3 pounds, large is 5 pounds. All sizes are approximate.