GroLine pH 4.01 Buffer Sachets, 20 mL (25 pcs.) HPS This product is a replacement

This product is a replacement part for the old style HF COSYS

Poly-tainer™ cans are available in #1 to #6 sizes and a variety of shapes including square

minimal pH drift is assured

The idea is similar to a Prune Pot (fabric pot)

has no on/off buttons to worry about and does not need calibrating

GroLine pH 4.01 Buffer Sachets, 20 mL (25 pcs.) HPS This product is a replacementHI70004G is a high quality pH 4. 01 calibration buffer 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. Supplied with Certificate of Analysis Single use sachets for convenience. Perfect for use with GroLine testers and portable meters!