To make clear ice we recommend using distilled water, boiled water, or water that comes out of a reverse-osmosis (RO) system. It may not come out perfectly clear but at least the ice will not appear cloudy. If you are looking to making clear ice it is more about the method of freezing than the water. The cloudiness in the H20 is caused by the O being trapped in the H.

There is also a technique called directional freezing that forces water to freeze top down, pushing all the air down, while the ice on the top is crystal clear.  We used that technique to develop a compact ice-making system called Clearspheres that uses directional freezing to create crystal clear ice spheres using any type of water!