Just got a 36"x12"x18" sump refugium combo yesterday. I had to customize the pipes a little, but I got the whole setup. Im going to have to get refugium mud, but I gues it can wait a few days. Im also getting lr rubble to help with it, and a new light. My tank is a 45 gallon, so just wondering exactly how much mud ans rubble I need. The aqua c that came with it has to be on my display, but it produced skimmate in about 30 minutes so I was happy.