dry rocks

Hi I have a 20 gallon innovative marine fusion and was wondering... How long before the dry rocks turn to live? How long before adding a second fish? How long before adding corals? How long before the first water change? How long before adding a protein skimmer? Thanks!

hi, I'm new to this hobby and I don't have any fish yet, but I have some supplies. I'm going for a vacation and I will buy some dry rocks... I used to think I can just put it in... But I guess not, I have to cure it, here are my questions about curing prosess: 1. Do I need a specific salinity...