Chlorine Range: 0

01 calibration solution designed for accurate calibration of pH meters

physically blocked at 0

In a long-term emergency

GroLine Storage Solution Sachets, 20 mL (2 pcs.) HM Digital COM-300L Chlorine Range: 0HI70300G is a high quality storage solution designed with hydroponics, aquaponics, and greenhouses in mind. Single use sachets are highly portable, with a small footprint and a lightweight design. They are the perfect accessory for your on the go testing, fitting easily into your pocket or carrying case. Specially formulated for storing GroLine electrodes. Single use sachets for convenience. Perfect for use with GroLine testers and portable meters!