How much fluoride does Helix add to my water?

Helix supplements naturally-occurring fluoride in our drinking water to meet the standards established by the Division of Drinking Water (DDW). The optimal level of fluoride in our area is 0.7 milligrams per liter (mg/L) with a control range of 0.6 to 1.2 mg/L. Helix uses fluorosilicic acid, a chemical certified under American National Standards Institute (ANSI) / National Sanitation Foundation (NSF) Standard 60 and approved by the DDW.

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1. What is fluoride?
2. How much fluoride does Helix add to my water?
3. Should I or my children take fluoride supplements?
4. Will fluoridation affect my children?
5. I have a fish tank. Will fluoridation affect my fish?