Adjust it slowly until the water "feels" the way you like it. There is no magic number. You are paying for the system and chemicals so set it to your taste. I would adjust it up or down and let it run for a week and see how it feels on your skin and how it tastes to you. If it seems to be getting worse, go the other way for a while.
Answers & Comments
Adjust it slowly until the water "feels" the way you like it. There is no magic number. You are paying for the system and chemicals so set it to your taste. I would adjust it up or down and let it run for a week and see how it feels on your skin and how it tastes to you. If it seems to be getting worse, go the other way for a while.