GroLine pH 4.01 Calibration Buffer (500 mL) extension Operating Humidity:

Operating Humidity:

Designed for and formulated for hydroponics

soft-sided container that benefits your plants

Its three digital screens continuous display current temperature

Rootamentary will boost flower and fruit development

GroLine pH 4.01 Calibration Buffer (500 mL) extension Operating Humidity:HI7004 050 is a high quality pH 4. 01 calibration buffer that is NIST traceable and supplied with a Certificate of Analysis. Hanna calibration buffers have the lot number and expiration date clearly marked on the label and are air tight with a tamper proof seal to ensure the quality of the solution. Hanna's line of technical calibration buffers have been specially formulated to have an expiration of 5 years from the date of manufacture for an unopened