I assume you're looking for a HOT (hang on tank) skimmer? I had the same question a while back; all my experience with skimmers was with in-sump types. I was directed toward the AquaC Remora line of skimmers. I got great advice, I have a couple Remora Pro models, with the optional surface skimmer/bubble reducer boxes. I love them, can't find a bad thing to say about them. A little pricier than what you're looking at; but judging from the feedback I got--well worth it.