Marcorocks normal shape natural 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. Whether you are building a Saltwater fish only, a Reef tank or a Fresh water tank you will love this rock and so will your wet pets. 

It is highly porous and beautifully shaped.

MarcoRocks Key Largo is a natural rock that is harvested on land from an extinct reef system buried when the Florida land mass was formed.
The Key Largo rock is a "green" product, because it is not harvested from a marine environment it has no negative impact on our delicate reef or marine ecosystem.

Totally pest and organic free that's also environmentally friendly.
MarcoRocks is the choice of many public aquariums, aquaculture facilities and custom tank builders all over the world.