I have a 125g brakish tank. I have had cloudy water in this thing for about two weeks now. I initially chocked it up to the tank cycling since i had upgraded the filter to a FX5 i got off craigslist. I did clean out the filter very well with just very hot water. all of the media is new except for about half of the ceramic rings. all of the rocks inside the tank and the driftwood were not touched. like i said, i figured that it was just the tank cycling a bit due to the new filter but two weeks later the cloudyness has not gotten any better. my ammonia has been a .25 for the last 4 days. i add stress zyme to all changed water when the water gets changed. all the fish are doing fine all eating and very active. I upgraded the filter system in a 20g feeder tank with about two dozen shiners in it and it cycled in about a week and the water now is crystal clear. Im not real sure whats going on. Any help would be very much appreciated!