I’ve been considering how best to plumb the dual overflow/return on my center drilled 150gal build and I need some input from you knowledgeable reefers out there: Is there any reason I couldn’t pipe both of my overflow down tubes through two algae turf skimmers? In theory this would mean all of my tank water would filter through an ATS 10+ times and hour, which should help (once it matures) keep some of my parameters really stable with relatively little maintenance... right? This afternoon I quickly sketched up a concept and modeled it to show you what I have in mind. Any thoughts or advice would be greatly appreciated! (Krug the betta is the best design partner) My overflows are on opposing ends of my tank. So I’m thinking a “weir” system with a three sided acrylic flume on either end of my sump. Each ATS flume has a clear acrylic lid, with a grid of grow LEDs facing into the flume. The flume body is made of black acrylic or abs. Water overflowing from the tank enters the top of the flume through a slotted pvc tube. If I leave a small lip at the bottom of the flume, a sheet of frosted acrylic (red arrow) could slide in under the spray bar, and rest against the bottom lip. Algae grows on the surface of the frosted acrylic sheet. To clean, simply remove the flume lid, lift the frosted sheet off the bottom lip of the flume. Slide the sheet out of the box, scrape the algae off and reinsert. Let me know what you think! If it helps I’ll upload a layout of my sump this evening.