Hi all, I have a 5x2x2 with a baby Giant Gourami, an Ompok bimaculatus and a Senegal Bichir. i'm using two filters at the moment, an 1500lph canister and a 2500lph internal. I have been considering upgrading to a Fluval FX5, as from what I hear, they are excellent filters. is this a worthwile upgrade, or should I just stay wih the filters I already have?