This box is the one I want to get. Along with a luft pump. The luft will keep the water going no matter what.....if the power goes out and comes back on it will restart the siphon. This one is plenty big for us, im pretty sure my pump is pushing about 350gph.....soo the other one is too small.....BUT i could cut my pump back a little and buy the smaller one.....taking up less room. There is a video on there you should watch. Its pretty cool. :)

http://www.marinedepot.com/ps_ViewItem~ ... ndor~.html