cured rock has been through a cycle and is free of any dead biomaterial that would decay and introduce ammonia in your tank. as long as you get it from the LFS
to your tank relatively quickly you shouldnt see any die off.
uncured rock has been removed from water and the living creatures on the rock have died and have started to decay. once introduced into your tank the decay will continue and ammonia will show up in your water. eventually, the your cycle will run its course and the end result will be cured rock and a cycled tank.
Originally Posted by mnestroy
Yes I am aware of the "humane method" of cycling a tank, but 6 of the local pet stores told me to do it this way.
and what happened... you bought a damsel, it died... you went back and bought 2 damsels. the LFS
is in the business of selling you stuff, not necessarily giving you the best advice. yes, in a perfect world they would sell you what you needed and give you perfect advice. plus, most of the employees at the LFS
are young kids with no experience keeping SW
tanks, and they just tell you what someone has told them before... trust me, i used to work in retail electronics and the sales staff just makes something up if you ask questions that they dont know the answer to. i cant see it being any different in other retail settings.
the people here at AA are not in the business of making money. the people here love their pets and want other to take care of their pets and enjoy the hobby. the advice is usually good, especially when multiple people tell you the same advice... best bet would be to ask questions here, or at some other non-commercial forum, and evaluate the responses. then you can make an educated decision.