PC water-cooling refers to the method used for decreasing the temperatures of the computer processor along with other components such as graphics cards and many more. When there are no choices left, all that the user needs is distilled water. Actually, it’s not preferred in normal cases but that's more than enough for the pump to move the liquid around and absorb heat from the blocks to the Water Cooling Radiator. Moreover, the biocide is added to the coolant to protect all components of the PC from corrosion and prevent bacterial growth. It also doesn’t color the water resulting in a clear liquid.