Roxtract water has a ph of 6.9. When processed in the body, we get a ph of 7.6 in the blood. Back to top Q: How often do I have to change the filter? A: Our ceramic filter is designed to last at least one year. Be gentle when you clean it with a dedicated sponge or cloth. Do not use cleaning agents! Back to top Q: How often do I have to order solution? A: A 32oz. bottle of Roxtract solution will treat approximately 265 gallons of water. Drinking one half -gallon a day would provide 530 days of water. Of course, it will depend on the usage of the Roxtract water. You can cook with this water. You can make coffee or tea with this water. You can give this water to your pets, wholl love it. Your plants will love it, too. If you have 4 people in your family, mathematically it will provide 132.5 days of water! Financially, this equates to 67 cents per gallon! Back to top Q: How long is Roxtract solution/water good for? A: Eternity! We recommend that it is stored in a dark place, as green alga