I am getting ready to redo my 70 tec tank and I am looking for ideas. The tank is sitting in the corner of the corner of the room and is really only visible from the front and left side. The right side is 7" from the wall. I was thinking about blacking out that right side and possibly moving some rock work over there so it will kind of wrap around the tank. I have also been thinking about a possible closed loop system to eliminate the power heads from the display. The tank is a bit on the small side so the power heads take up room. The down fall to this from what I have been reading will be power consumption. Another Idea I was thinking about is to add piping under my sand bed with exits to help create more random flow. By doing this I realize a check valve would be needed as well as a hole near the surface to break the siphon in case of power loss. What is everyones recommendation?