mines not exactly "under the hood" either, it's mor like in front, on the floor, and completely overkill. It was for my 75 gallon, I moved, had do downsize the display, and didnt have the cash to downgrade to something more practical for a 30 gallon, the sps dont mind the stability though! right now, I dose vodka, 1 gpd. of 1.5tsp/gal kalk, and change 10 gallons bi-weekly with oceanic salt for mag.