Here is a picture of my fuge. It has a place on the right for the turbulent water to enter. A center fuge zone. A small area for filtration if desired and then the spot on the left for a submersible pump. It has fine aragonite mixed in with live sand and Caulerpa Racemosa and Prolifera macroalgae. I also put in some Chaetomorpha and a crab that was terrorizing my wife's 10 gal nano tank. BTW I hope I didn't embarrass Birdlady because her fuge looks a lot nicer than mine. One question, how do you keep the incoming pipe in a fixed position, so it doesn't move all over the place?