I have a question that I need some advise on. I am currently cycling a 46 gal tank with an Emperor 280 filter (which said up to 50 gal). But now I am wondering if I should have gotten an Emperor 400 instead. I didnt do enough research at that time, but now I read that most people who have 30 gal and up tanks use Emperor 400. Should I be using the 400 version instead of the 280??