I was thinking of upgrading my current canister filter, Tetratec Ex700. I have a 55g and it is rated for a 60g. It does the job fine but i just fancy something bigger. I was thinking of the FX6. Would this be overkill on a 55g??. Any suggestion/advice welcome. I know i will probably get suggestions for an Ehiem, with it being hard to get and the price, it's out of the question. I don't think the Tetratec is available in the US but there are many generic copies of it over there, Sun Sun etc....