Thanks guys. I saw the small version working in a little 30ish cube(which is what i have) in southcenter over the weekend. "Looked" cute for a intank skimmer, seemed to produce decent foam and work, and was no more of an eye sore than an overflow setup. Sadly when looking for an intank skimmer, "efficiency" is not at the top of my list, as so much as #1 not airstone/wood block driven, and #2 looks good-ish.