I had the Coralife set up on my 55 and, after the initial tweaking period, loved it! If you go this route, you will need to make sure that the pump intake is less than 3" form the water surface (to ensure proper air intake), and you will have to clean out the airline every couple of weeks, and you will hve to check the skimmer every day to make sure the foam level stays constant. It will need occasional adjustments, but all in all I was very pleased with this skimmer.