I noticed tiny red bugs crawling on some of my SPS corals the other day. The corals don't seem distressed, but this may be a new thing (added some frags 2 wks ago, did not think to dip them). Are these likely to be pests, or is there a chance they may be harmless? Are there tiny red bugs that crawl on SPS without causing harm, or should I treat the tank with Interceptor?