Cured rocks also contains bristleworm, brittlestar and various hitch hiker, FYI if you never notice...
Even the most matured rocks also contain theses...
The presence of these and the denitrifying bacteria that makes LiveRocks...
Even with little Ammonia, they can still continue with the ANN, just that the bacteria will not be enough to handle high load... Thats why stocking at the beginning must be slow and gradual...
Correct me if i am wrong... lol..