a few weeks ago the pump on my chiller seized for a day without me knowing and the temp was close to 90 when i finally realized it, after i got the temp back down to 77 i noticed over the next week that a huge green algae outbreak occured, how can i rid of this without bothering my corals and fish? of course none of my 5 tangs are eating it either lol, would a seahare do the trick? i also heard seachem magnesium? or just water changes?