When it comes to my fish my wife will always give in to what I want for she knows how much I love them and take care of them. But she is no happy with the noise coming from my 75 gallon tank I have emperors 400 and 280 and to me its a light noise that I am use to but my wife thinks it is too much.I know every hob filter makes some noise but is there any that makes less noise than the emperors?I would like to keep my wife happy and get something quiter that does not end up being too expensive. I have only used Marineland penguin and emperors so dont know to much about aqua clear filters or others. Any advice would really be appreciated. Thank you.