Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
Causes of cloudy water:
Beginnings of green water algae. It does look white or off white at first. Testing by looking at the water against a white background may show it is really green.
Heterotrophic bacteria. These grow fast when they have a food source (debris from uprooting a plant, in this case) but die down once the food is gone. Water change and wait it out.
Fish stirring the substrate, or uprooting the plant. Trapping the material in fine filter. Perhaps adding flocculent.
pH altering materials added to the water.
Something else dissolving in the water- Did someone over feed? Even though the foods say they do not cloud the water, a massive over feeding could. You would see the flakes on the floor of the tank.
Something else added to the tank. Anything else.