GroLine pH 7.01 Calibration Buffer (500 mL) Nutriants apply once a week from

apply once a week from seedling/clones to week 3 or 4 of bloom

azospirillum spp

resulting in increased photosynthesis

automatic shut-off cartridge

GroLine pH 7.01 Calibration Buffer (500 mL) Nutriants apply once a week fromHI7007 050 is a high quality pH 7. 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