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Marco Base is a natural rock that is harvested on land from an ancient reef system buried when the Florida land mass was formed.
Whether you are building a Saltwater fish only, a Reef tank or a Fresh water tank, and even reptile environments, you will love this rock and so will your pets. It is highly porous and beautifully shaped.
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. It comes to you pest and organic free.
