This is the term for a medium or solution with a pH less than 7.0 as measured using a digital pH meter or with litmus paper. A lower pH is more acid.
This is the term for a medium or solution which has a pH greater than 7.0; a higher pH is more alkaline. Also referred to as basic.
The ability of a medium or solution to resist change in pH fluctuations.
General yellowing of a plant due to a lack of chlorophyll production during photosynthesis. This is typically caused by a pH imbalance, or nitrogen or iron deficiency.
A naturally-occurring mineral complex that’s used to lower the pH of a grow medium.
A naturally-occurring mined mineral complex which will raise pH.
A chemically-sensitive paper that can be used to determine pH.
A measure of the molecular concentration of hydrogen ions in a solution in a scale ranging from 1-14 with neutral being 7. Keep in mind that the pH scale is algorithmic-a reading of 6 is 10 times more alkaline than a reading of 5-so make changes very slowly. From 5.5-6.2 is considered an ideal range for hydroponics, depending on the grow medium or hydro method being used.
An electronic device that measures pH.
