hey guys, recently i installed a fluval 406 canister filter. i had two penguin 200 power filters. i took one out so i can make room for the canister tubes. i still have the other penguin in there. i keep on having cloudy water and its been about 3 weeks since the install of the canister filter. i did a water change yesterday and its still cloudy. i tried using acurel f and it didnt work so i decided to put in my uv sterlizer to c if it will help. am i doing something wrong? please help me out.