As you can see there is alot of speculation as to what could be wrong with your tank. I would say that it is not cycled, testing ammonia, nitrite and nitrate levels will help determine this.
Since you are using a chemical to clear the water in your tank I would assume the cloudiness has been a persistent problem?
Since you are using a chemical to clear the water in your tank I would assume the cloudiness has been a persistent problem?
You need to figure out why your ammonia is high. Most likely it is because the tank is not cycled or your cleaning/water change proceedure is wiping out your beneficial bacteria. Once the ammonia goes down nitrites are produced which can be just as deadly for your fish.