Real aragonite, no cement, no curing. Rich in macro/micro-porosity, pre-infused with bacteria for great bio-performance. Clean, safe, eco-friendly, and each piece unique. Aqua scaping is important for fish/inverts as they need shelter to feel secure & show normal behaviors, rarely seen in the wild. Reef Rock is ideal for attaching inverts, and Caribsea rock is clean & pure without any chemical treatments. Available as per rock in various sizes.