A <b>pH</b> of 3.5 or less is considered optimal range. SCD Probiotics products with a pH of 4 can be used for waste treatment &amp; septic tanks. Range of pH tape: 2.9-5.2

<b>Usage:</b>
Dispense pH paper from container (about 2 to 3 inches). Submerse one end of the paper in the liquid for which the pH is being tested. Lay the damp end of the pH paper on the side of the container with the pH meter. The color of the damp paper will correlate to a pH reading.