Quick answer
pH tells you how acidic or alkaline water is (7 is neutral). ORP, in millivolts, tells you whether water tends to oxidise (positive) or act as an antioxidant (negative). TDS, in ppm, is the amount of dissolved solids such as minerals. Typical RO water: pH 5.5–6.5, ORP +200 to +400 mV, TDS 20–150 ppm.
pH: acidic or alkaline?
pH runs from 0 to 14. Below 7 is acidic, above 7 alkaline. Believe offers pH 3.5 (cleaning) up to 10.5 (washing produce), with 8.5–9.5 for everyday drinking.
ORP: oxidising or antioxidant?
Oxidation-reduction potential is measured in millivolts. Positive values mean the water tends to oxidise; negative values mean it tends to donate electrons, which is antioxidant behaviour. RO water is positive; Believe water goes negative.
TDS: how much is dissolved?
Total dissolved solids, in parts per million, is mostly minerals. For an ionizer, 100–150 ppm is ideal: enough minerals for efficient electrolysis, while still being clean RO water.
Key takeaways
- pH: acidic below 7, alkaline above 7.
- ORP: negative mV = antioxidant potential.
- TDS: dissolved minerals, in ppm.
Frequently asked questions
What pH should I drink daily?
For everyday drinking, Believe recommends Alkaline 1 (pH 8.5–9.0) or Room-Temp Alkaline. Start gently and let your family adjust over a week or two.
