I’m still pretty new to reefing (close to 5 months now) but I always thought having as much diversity as possible in the tank was best. Trying to simulate the ocean with all its micro organisms just seemed right to me. Nature already has this “perfected”. I never thought having a “sterile” system made sense. Now that there’s a way to measure how much biodiversity you have is exciting. Also, being able to determine what microbiological organism is ailing your aquatic friends is also a plus. No more, “it’s possibly brook” or Ich or velvet or “name your disease”. Though, I’m not sure we still have the full picture, with this piece of the puzzle we’re getting closer. With testing parameters, visual inspections, to a small degree our sense of smell, and now biodiversity of the microbiology of our tanks, we’re ever closer to reaching NSW. Though we must head the warning provided by BRS amd make sure we don’t swing the “pendulum” to far the other way from sterile that we go too far. Very exciting, though.