Most people are concerned about the purity of their drinking water. There are several ways to purify water that include biological processes and chemical processes as well as using a physical barrier. The reverse osmosis method of filtration uses a selective membrane that is able to remove large molecules from a solution. This means that the selective or semi-permeable membrane can separate dirty or tainted water into clean and dirty water. Pressure is applied on the tainted water side of the membrane, and this allows the pure water to pass through to the clean water side. The larger molecules of the contaminant cannot pass through the membrane so the water is cleaned. SureAqua products use reverse osmosis (RO) for their water filters.

Carbon may also be used to purify water. In this method, water is passed over the activated carbon which attracts many impurities. However, it may not be as thorough as reverse osmosis. For example, both techniques can remove organic compounds such as pesticides and herbicides. However, parasites, cysts, viruses and other harmful constituents are only removed by the RO method. Another method uses ion exchange resins that bind to mineral salts in unpurified water. Most impurities in water are these dissolved salts, but this resin deionization process does not remove bacteria and viruses like RO does. This still puts SureAqua Products ahead of the games since they use the superior RO process.

Iodine is sometimes used to disinfect water. Five drops of two percent iodine like you might find in the medicine cabinet, is added to every quart or liter of water. For cloudy water add ten drops, and let it stand for 30 minutes. Iodine will not kill bacteria on contact. It needs at least 20 minutes depending on the concentration. One drawback to using iodine for swimming pools is that it is not an algaecide. Also the water may have an unpleasant iodine taste. Chlorine is often used to disinfect water since it can rapidly destroy most harmful microbes. Unfortunately it has limited effectiveness against pathogenic protozoa such as Cryptosporidium and Giardia. SureAqua Products can easily remove these organisms with the RO method.