That's a cool looking setup. I use a Fluval 404 canister and a Skilter 350 gph HOB and have 0 amm, 0 nitrite and 0-trace of nitrate. My xenias, mushrooms and Kenya are growing and spreading like fire, which why I finally posted some pics. As a back up for nitrate removal, I have cheato in the DT on one end toward the back. I have to thin it every now and again, but everything in the tank seems quite happy. Also, I have a huge rock anemone you can see on the thread a put up today. I like a more natural looking reef, so it works well with the rest of the reef.