i am setting up a 630 litre (163 gallon) tank(without filters). i have al ready got one canister filter but i would like to run 2 as it is a brackish set up and the fish will have more excrament as i am going for large fish. so far ive got a sunsun filter and i was thinking of getting a fluval 404 is this a good filter. i am able to spend up to $290 american or $350 australian on the one filter. would some one be able to tell me a good filter in that prcie range.