In chemistry, pH (potential of hydrogen) is a numeric scale used to specify the acidity or basicity level of an aqueous solution.
pH measurements are important in agronomy, medicine, biology, chemistry, agriculture, forestry, food science, environmental science, oceanography, civil engineering, chemical engineering, nutrition, water treatment and water purification, as well as many other applications.
The pH utilizez a numeric scale with numbers from 0 thru 14. Number 0 is very Acidic while number 14 is very Basic. Number 7 is considered neutral.
For optimal plant growth, the pH level of your nutrients should be adjusted to its appropriate level. Various plants like different pH levels. Most experienced growers consider the ideal pH for most plants to fall between 6.0 and 7.0. The pH value of the nutrient solution will determine the various elements available to the plant. Growth rates, water quality, and growing medium are just some of the major factors that can destabilize the pH in your nutrient tank and affecting the growth rate and development of your plants.
Microelements such as iron, maganese and zinc become less available as the pH is raised from 6.5 to 7.0 or 8.0. Molybdenum and phosphorus availablity in the opposite direction. pH values which are too high or too low will be detrimental for optimal plant growth.
pH can be easily measured thru the use of pH Test Strips, drops or an electronic pH meter.