Lifetime of Live Rock

[JPotter]

Does the sea water and/or sand/mud/rock have to be from temperate sea water? I would expect so as bacteria are quite specific about environmental needs. Thus it will not be much help for those who live in colder regions. Hopefully I am wrong and will find it is OK for me to go down the street to get sea water or out on the boat to get away from poluton potential...then I would just heat it up to temp.