Most tap water is treated with chlorine and ammonia for sanitation. If tested with OTO it will show a total chlorine content that is mostly chloramines. These will raise the pH somewhat.
Re: Testing my tap water pH
Most tap water is treated with chlorine and ammonia for sanitation. If tested with OTO it will show a total chlorine content that is mostly chloramines. These will raise the pH somewhat.
Retired pool store and commercial pool maintenance guy.
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