pH Pens by Hanna Part:pHep5 -2 to 16.00 Crystal Sea® is preferred by

Crystal Sea® is preferred by many public aquariums

24’ x 14’

There are multiple display options for small to large ponds

Formulated in a highly concentrated powder

32 grams will treat 1

pH Pens by Hanna Part:pHep5 -2 to 16.00 Crystal Sea® is preferred byThese easy to use pH pens from Hanna Industries are waterproof and will float. They feature automatic shut off, temperature compensation, replaceable electrodes, hold function, stability indicator and temperature readings in either C or F . Choose pen with sensitivity in tenths (98127) or hundredths (98128). Pens weigh only 3 oz, measure 7 l x 2 w. Use four 1. 5 V button cell batteries (included). Calibration solutions sold separately.