Machined flat on one side for perfectly balanced and stable aqua-scaping. Can be bonded with matching Coralline E Marco-400 for permanent placement.

Our MarcoRocks is the finest all natural aquarium rock available to the aquarium enthusiast today. It is a once live natural reef rock.

All natural calcium carbonate rock. Never any chemicals, additives. Often, you can spot fossilized ancient corals in the rocks.

Eco-Friendly Sustainable Rock

Our rock is a "green" sustainable product, because it is not harvested from a marine environment it has no negative impact on our delicate reef or marine ecosystem. Combine this with our unique no chemicals cleaning and processing and you get great looking rock that is pest free that's also environmentally friendly.