I thought about that, yes. However when I was rearranging the rockwork I found a 13 gallon plastic garbage can to set the rock in that I thought would make a decent rock bin, at least for the time being. I figured I could use a heater, a few airstones, and a simple florescent light fixture on a timer. Now that you mention it though, a powerhead would be a great idea. What should the salinity be kept at, and how carefully should I monitor it? Would it be a good idea to add a few inverts or, perhaps later on, a damsel or two when I get a larger bin or rubbermaid tub?