Koi Medic ECO Ph Meter Pen

Electronic pH pens are far more accurate than guessing at color charts. This Trans Instruments Koi Medic – pH pen is simpler to use and more affordable than previous models. Water resistant, shock resistant, automatic shut off, low battery indicator. The pH pen is supplied with a sturdy plastic carrying case, instructions, and a small bottle of calibration solution to ensure accuracy. 

Additional Information:

pH is a unit of measure that describes the degree of acidity or alkalinity of a solution. It is measure on a scale of 0 to 14. Technically, pH is defined as the negative logarithms of the hydrogen ion activity or concentration.