Just curiuos because I havn't ever done it. I want to plumb all my systems together in my fish room. In order to do so I will need to go from my overflows on one sytem down to the floor then back up to my sump. The overflow will still be higher than the sump but it will essentially create a "trap" in the plumbing. Any problems with doing so other than noise? I will put "vents" on both sides of the "trap"