I've been a fish only guy for ever, but have been out of hobby for 10+ years and recently got the bug again and am amazed at how the hobby has progressed. I'm planning to have a 75 with 30 gallon sump up and running by thanksgiving and just mulling over some things. The one thing I haven't seen discussed is how many corals can be added at a time. Is there a general rule of thumb like x number of frags or so many colonies or is it dependent on type, softy, lps, sps. My plans are softys and lps to start but may decide sps at some point. Open to any and all ideas at this point.