Skim, skim, skim for that new rock and do water changes (10% a week or more). If you don't already have a protein skimmer, you'll really want to pick one up. It sounds like your rock is most likely still curing, so that's going to take a couple of weeks. Most people with reef tanks try to avoid adding a bunch of chemicals to their tanks. Many of them tend to have side effects that aren't on any label, and truthfully, once you really get your tank up and running (I'm still not really there at 7 months, so be patient), it does a very good job at keeping itself balanced.