I decided the turf scrubber is not going in the sump, but will be on it's own. I now understand a little more about how to set up the flow control into the fuge with a ball valve while the remaining flow gos into the return section, just not exactly how to do it in the space I have while being able to get at it. Any one have any reason I might want to get into my fuge once it's set up? I'm not planning on putting macro in it or light on it, also how deep should the sand be? I don't have the room to do a deep bed like Flower, so I hope that 2in or so will be enough. What would be better more rock less sand or more sand less rock?. I'm looking for food more than filtration out of my fuge because hopefully the ATS I'm going to make will handle the bio load. I like the idea of being able to control my flow in the tanks and fuge independently of each other, so I'm going to keep working on how to make it so. I'm wondering what people think of a fuge that would be square with a divider in the middle for flow control. So it would be something like 26L and 20W with a divider making it so the water would flow in one side that would be 10x22 or so with 4in open in the other end and then come back on the other side allowing me to have the in flow and out flow on the same side of my fuge, but still have a constant flow from all going the same way.