What causes cloudy water?
Cloudiness is usually caused by a bacterial bloom – which are usually harmless. Cloudiness is common in new aquariums. If your water is cloudy, then you should increase the aeration and make sure that the filter is working correctly. Siphon the gravel and change a small amount of the water (20%) regularly until it goes away. Also be sure to test the water to make sure there is not an underlying problem. Sometimes cloudiness can be caused by over feeding, or by failing to remove any uneaten food. If this is the case, then you may have a water quality problem too.
