Oh, haha, yeah it's a giant spraybar. I rebuilt this one twice now, and I drilled the holes too big so it it only partially works, but I don't think I want to go through the effort of rebuilding it all again. It basically allows for the return pump to circulate the entire flow into every part of the tank so you don't need powerheads in it. However like I said I made the holes too big, and the flow mostly just comes out the top part and there's a partial dead zone @ the very bottom of the tank. I haven't decided what I want to do about it. I'll probably just add a Koralia to it.
