Hi, i've currently purchased an all-in-one fish tank with the bio filter in the top aswell as the 3 lights. It measures 85cmL*44cmW*55cmH. I've been told that if i wanted to keep corals and fish successfully i will need another means of filtration aswell as more water circulation in the tank. Seeing these tanks are non compatible with skimmers, would a fluval 304 canister filter solve both these problems or is there another way i can go about it? Any help on this topic would be great thanx.