I run a Euro-Reef, probably the best, or at least one of the best on the market.Comes with pump, runs super quietly, efficiently and lovely bubbles. overflow cup is easy to dump and clean and it just runs and runs and runs. It is simple to set up and the adjustments are very easy to make, Get the tallest one that will fit under your tank (be sure to check your head clearance before purchasing your skimmer. You want it to fit!