I have a 100 gal TruVu that measures 4ft x 2ft x 20". I can only fit one Penguin 330 in the back, so I need more filtration because of so many fish. Can anybody help me in choosing between the Fluval 404 & the Rena XP3? These are the largest canister filters under my $100.00 buget. Please help w/some opinions 