hi im very new to looking after fish but have been interested in it for a few years. I bought my first tank (4 gallon) last week and got told to set it up with the filters and everything for about a week before i put fish in it. I also got told to put a flake of food in everyday to create bacteria? but after 2 days my tank went cloudy. Ive checked all my ph, nitrite etc levels and they are all ok. Any ideas would be appreciated, thank you :help: