Hi Everybody,
I think there's not much to say about why your water is cloudy! It is for sure a bacterial bloom due to excess fish in a new tank.
For my experience I would advise a partial water change of around 30% of your tank twice a week at least, for about the next 3 to 4 weeks and the water will clear it self out as soon as your bio filter establish.
If your are looking for a faster solution I would advise on a UV lamp, that is always a good addition for every tank, on a permanent basis. Don't forget that this solution may delay a bit your bio filter setup, as it will kill your bacteria. So, I would wait around 3 to 4 weeks befores adding the UV.
Goodbye from Portugal,
Eduardo
Redfish