ok, i'm about to buy a diffuser aerator from stoney creek, big pump with five diffusers for my 7 acre pond (shaped like a swimmin pool, deep end, shallow end) i'm having an electrician come out to arrange the proper cable (230 volt/7amp running) today or tomorrow, then i'll buy the unit from stoney creek. $1080.00 or so. any last commments? does anyone have one of these? pros/cons/ noise/ cost per year for electricity/ etc. any comments appreciated. thanks mark