Lonestar its going to be a heavily stocked mixed reef with the upper section containing a majority of SPS. This particular skimmer will be for a 55 gallon set up. I will be shopping later on for a much larger system and wanted to find opinions of this brand since I have already heard many positive reactions to the ATB types. The Elos one seems to be really interesting to me as I can picture the flow of bubbles causing more contact time and more gunk. I was wondering how well the smaller version works because I have read that the larger ones are great. I am guessing that there are not many people here that are experienced with these products.