I swapped my Red Sea for a Deltec SC1660 and I love it. Started working straight away and it has not over-skimmed so far. Easy to adjust and fits in the same space and takes up less room (though I had to remove the shelf as it needs to sit lower in the water. Fairly quiet and lower wattage I think. Easy to clean and to see how the cup is filling up and really pulls out the gunk.