Item number: 3830063021141 View all from Kefirko > View more: DIY Foods > Kefirko - pH Test Strips - 80 pcs pH test strips supplied with pH color chart and 80 litmus paper test strips. Colored test strips should be compared to the pH color chart to determine the pH value: the smaller the number, the stronger the acidity, the larger the value, the stronger the alkalinity. (The term alkalinity is used for acid buffering capacity.) Do not dip directly into the liquid, but drop the test liquid onto the test strips. Product specifications pH Test Strips 80 pcs Item description pH Test Strips 80 pcs Item number 3830063021141 Product type Accessories Country of origin Bulgaria Approximate pH values of various fermented foods: Kombucha: 3.5 - 2.5 (7-10 days fermentation); Water kefir: 3.5 (48-72 hours fermentation); Milk kefir: 4 - 3.5 (24-48 hours fermentation); Sauerkraut: 3.7 (7 days fermentation); Pickles: 3.2 (7 days fermentation)