This Calcium Carbonate XO White filter media is manufactured by Imerys Marble Inc. Tested and Certified by NSF International against NSF/ANSI Standard 60 for material requirements only. Recommended Additional Filtration Systems Whether your home/cottage uses lake, well, or municipal water, it is recommended that your water be tested to see if any additional filtration systems should be used to give you the highest quality water. For example, you may require a Water Softener to remove hardness, an Ultraviolet System to remove bacteria, or an Iron Filter to remove iron, manganese, and hydrogen sulphide. Choose Excalibur Balance your water's PH and avoid negative effects of having acidic water in your home such as pipe corrosion and staining with a Filtermax™ Neutralizing Filter from Excalibur Water Systems.
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