i have a forty gallon tank that i got about a week ago and i cleaned it and cycled it and it was good then i put my fish in and about 3 hours later the water got cloudy does any one know what was wrong and how i can fix it
I'm wondering the same thing... Anyways, seeing as how your tank hasn't fully cycled yet, adding in fish will dramatically increase the bio-load, and in turn causing the water to cloud from a bacteria bloom. Did you thoroughly clean the substrate before putting it in the water? The cloudiness will usually go away within a week, but may take longer since your tank/system needs to re-establish itself.