Currenty I have a Fluval 405 and just got this Cascade 1000 filter, but after only a week of service the Cascade has gotten quite loud and I am planning on returning it sometime this week and replacing it with an Eheim and just being done with it. So as of now I have a 55 gal tank and am planning on upgrading to at least a 75 if not a 90 in the next year or so. With that said I plan continuing to run the Fluval 405 and either adding the PRO 3 G90 or the G160. The G160 is only like $14 more so was thinking of just getting that but was wondering if it would be too much or simply a waste. Thanks for any opinions as Im not one for making these kinds of decisions if I have had no prior experience with that particular product.