I have found that after filtering when I boil the water or freeze it into ice cubes, I sometimes get little white floating things in the water. What is this ''Floaters''?

With respect to the little white floaters in the water, it is not bacteria but rather a problem that sometimes occurs with hard (heavily mineralized) water. When water is filtered through your system, the Black Berkey purification elements actually increase the PH of the water. This is healthful as Pathogenic bacteria and viruses thrive in acidic environments and conversely have difficulty surviving in alkaline environments. This is also true inside your body. When the PH level of the purified water is raised, the acidity of the water goes down and the water is no longer able to hold as many minerals in solution. When this happens the minerals begin to precipitate out over time and depending on the mineral composition they will either sink to the bottom or float to the top. This process is known as flocculation and the precipitated minerals are usually referred to as "white floaters". The bottom line is that this is nothing to be concerned about, the white floaters are minerals that were already in your water; they are now simply visible whereas they were previously invisible due to their suspension in an ionic form.