
Growth Technology pH buffers - a known solution with a given pH value designed to determine the accuracy of pH meters and used to measure the pH value of nutrient solution.
It is important to realize that if you do not calibrate your pH meters at regular intervals using Growth Technology Buffer 4 and 7, the accuracy of the pH values indicated by the device will be unreliable. This can lead to serious crop losses and if this condition persists, it can lead to plant damage.
Growth Technology buffers use two values - 4 and 7 pH - to calibrate your pH testers, as they operate on the edge of the pH range you work with in hydroponics, i.e. 5.5-6.5. In the case of hydroponics, there is no need to calibrate pH testers to a different value, as you are only working in a small range of the pH scale.
When calibrating, it is advisable to use only a small sample of buffer solution in a separate container, test the meter, and then pour out the solution. Pouring out the used solution will prevent potential contamination of the fresh solution and ensure a longer lifespan of the calibration solution.