The word pH when separated means the resultant power of hydrogen. Thus, pH level is the concentration of hydrogen ions in the aquaponic system. This hydrogen concentration is important for the survival of living things including fish and plants. A low pH level equates to an elevated level of hydrogen ions, while an elevated pH level results in a low level of hydrogen ions. Thus, pH is the measure of the alkalinity of the liquid.
This level can be measured on a scale of 0 – 14. Water is considered to be pure when the pH level is 7.0. Anything with less than this is considered acidic and anything more than this level is alkaline. If the pH level is lower than 7.0, the nitrification process will slow down. This leads to deterioration of the water and becomes toxic to the fish. However, if the pH level is higher than 7.0, it can become strenuous on the plants.
It is important to check the change in the level on a regular basis. The pH content can be checked using litmus paper and a pH test kit that is easily available at all hardware and DIY stores. The price of each kit varies, as does the functionality. Any change in the pH level must be treated quickly.