[Anemone]

Depends upon how "cured" the rock really is. Many stores have bins of cured rock that they cycle rock through, and you can end up with some that isn't fully cured. So, drop it in your tank and watch your ammonia and nitrite levels.

Depending upon what has been in the curing tank, and how long the rock has cured, you may have to add livestock slowly to give the bacterial populations time to grow in response to the livestock you add (or, if it's a fresh cure, with lots of die-off in the tank and high ammonia levels, you may have a sizeable bacterial population from the get go). Easiest to add one or two fish and monitor your levels (ammonia and nitrite initially, then nitrate, and keep steady pH, temp and salinity (add calcium and alkalinity if you're going to keep corals)), to ensure you don't get a spike, then add more stock if your ammonia/nitrite levels remain zero.

Kevin