I have a skimmer where I use only the filter basket with the helix system and a basket at the main pump that comes from the bottom drain. they then get pumped by 3 inch line out to the bog where it splits to two 2 " lines both with a ball valve so I can regulate the flow tow them both.. The pond is 6 foot deep and while I have had some people jump on me saying thats not crystal clear, at 6 foot deep I have no issues with the clarity what so ever.