Did you stir up the tank??
Usually that can cause cloudiness in the water.
Nothing else to it. Usually I pour my water down slowly, and hopefully your water isn't contaminated.
I use
RO water (
reverse osmosis) so it's a lot better for fishes who don't require rock hard water like African Cichlids.
Also, you shouldn't buy any cloudy water control stuff... because it's sort of a waste of money. They don't do much.
You should just let the filter clean out everything. Try and wait for a few days.
I hope your tank is doing well.
Good luck!