For the past 15 years I致e run both of my circuits through 1 Sacramento Koi Advantage 15. The filter is after a 1200 poly tank pre filter. Recently I致e come in possession of 2 of their smaller beads(Advantage5) that I壇 like to plumb in tandem. The skimmer circuit will be returned on the waterfall while the other return will be to the TPRs. Years ago, SK also sold a glass bead filter that was plumbed in tandem with the bead. Before you jump all over me about the perils of bead filters, I致e had zero issues in 15 years. And I have a monster solar power system so power consumption is also not a financial consideration. If any of you have done this and have a clear picture of the plumbing, etc I壇 appreciate seeing it. Thanks all, have a great day.