MarcoRocks E Marco 400 Aquascaping Cement - Fast-Setting Underwater Adhesive for Reef Tanks, Fish Tanks & Aquascaping Projects | Safe for Saltwater & Freshwater Aquariums

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.