Tony, Justin and Dave are all correct. It's amazing how the brain selectively ignores a lot of things when you're looking at a reef tank (or anything else for that matter). Not that my tank is anywhere close to an RC TOTM, but can you guess which Tunze pumps I have in there?
Answer: There's a 6055 on the left side; a 6100 on the right along with a big honkin' Wavebox - are they very noticeable to you?