GroLine pH 4.01 Calibration Buffer (500 mL) rockwool A high performance drainage layer

A high performance drainage layer is especially important if your plants are grown in plastic containers or with saucers underneath which can trap excessive moisture and create a soggy root zone

The spectrum is comprised of 410

flowers and house plants

Conveniently sized to fit any of the Gorilla Grow Tents allowing you to keep your grow floor free of nutrients

10ft power cord and 240V adapter included

GroLine pH 4.01 Calibration Buffer (500 mL) rockwool A high performance drainage layerHI7004 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