Currently I have a fish only tank, but I want to get some inverts. This means i will have to get some live rock. If I get cured live rock, will it add ammonia or will i be ok. I know adding non-cured live rock will cause my ammonia to spike, which would be bad. also if i get live rock do i need a protein skimmer. I have spent a boat load already and don't really want to spend tons more. i will only want 2 small pieces of live rock because i only have a 30g