Aragonitic calcium carbonate rubble for assorted aquarium uses. Use to aquascape, support aquarium biological filtration and more! Rubble-sized pieces of high quality aragonitic calcium carbonate allow versatile use for your aquarium projects. CaribSea Rubble Zone is your perfect choice whether you’re looking to aquascape, add a productive refugium, create a cryptic zone filter, provide additional buffering capacity for stable pH, or simply to boost biological filtration. The possibilities are only limited to your imagination! CaribSea Rubble Zone boasts many beneficial uses thanks to its very porous aragonitic calcium carbonate structure. Perfect as a natural biological filter media and buffering agent. As a Sub-Structure: Use to stabilize rock formations. For Coral Propagation: Use Rubble Zone to anchor new coral frags.

CaribSea Rubble Zone 3.8L