hmmmm tempting to swap one of my mag 18 for this ....but wonderin if it'll turn into what u said happened to ur tank ...... wat size tank were urs in when it was over? cuz mine is 300 , i'm guessin it would be fine but dunno cuz if i swap this , i still have another mag18 runnin on it so it would be like 5400gph on a 300gal xD