03-05-2009, 08:12 PM
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The curing process refers to the natural cleansing process of die-off. If the rock is packaged, and shipped, then once it arrives into your posession, it would need to be cured. If your tank is in the Cycling stages, you can cure the rock in the tank. The curing process will also feed the nitrogen cycle.
There is however, the concerns with predatory wildlife being introduced into your system. Generally, Live Rock suppliers go through a process where the rock is kept out of the water for several days, being periodically misted to keep the rock live, but it makes the rock less inhabitable for pests like aptasia, mantis shrimp, flatworms ect.