I have brought a tank and have left it to run for a week and a half and i have brought 6 fish, 2albino corydoras, 2mollies and 2guppies, the fish have been in for afew days but the tank is cloudy and was cloudy before i put the fish in, what shall i do? I have changed about 10% of the water every few days and i had thorougly washed everything before i put it all in, including the gravel and tank, i also put in water conditioner. Can anyone help?