I wouldn't trade my remora pro for any other skimmer save another aqua C product. I like their injection method, it produces great dark skimmate and is fool proof....no constant adjustments or fiddling with it.....I run the pro with the mag 3 pump and pre-skimmer box. On your 37 I would run the regular but do get the preskim box it is worth it.....I drilled 4 holes on the back and attach it with suction cups that way there is no fiddling with the height etc....stays put. I hide it behind the rockwork......in a perfect world I would have a sump and position it there.....in the sump by converting it to an urchin...that is still in the works.