I have recently had a problem with the water in my brackish fish tank being cloudy and I can not seem to get the water to clear up. I have a 55 gallon tall and only have 2 silver tip sharks in the tank. I have a EX70 Marineland fillter on the tank and a bak-pak filter on the tank also. I do water changes of about 25 % every week and the water still does not clear up. Can anyone give me any advise to clear up the water and get the cloud to go away