ezlife, one fluval 404 is definetly not going to be enough. I have 2 canister filters on my 75 gal and that barely does the job. I had to buy a powerhead with a quick filter to keep up with the mechanical filtration alone. I'm thinkng about getting a bigger tank around 140 gal and I'm definetly going with a Wet/Dry Bio-ball filtration system. They are pricey, but on what you would spend on 2-3 canister filters you could get one wet/dry. And from what I understand they require much less maintenance.