PLEASE NOTE: Hy-Gen pH DOWN and UP are classed as dangerous goods, and as a result we can only offer Click & Collect or Local Delivery. An alte...

Hy-Gen Calibration solution comes in 2 types, 4.0 and 7.0 Hygen pH Buffer is the upper calibration point in the "two-point" calibration of electron...

Hy-Gen Calibration solution comes in 2 types, 4.0 and 7.0 Hygen pH Buffer is the upper calibration point in the "two-point" calibration of electron...

PLEASE NOTE: Hy-Gen pH DOWN and UP are classed as dangerous goods, and as a result we can only offer Click & Collect or Local Delivery. An alt...

HY-GEN® is the mark of guaranteed quality. All calibration and care solutions are made using high quality analytical grade constituents. All formul...

Easy to use PH test kit to keep your plants at their best and always handy to have as a backup.

PLEASE NOTE: Hy-Gen pH DOWN and UP are classed as dangerous goods, and as a result we can only offer Click & Collect or Local Delivery. An alt...

Professors Organic pH Down is designed to decrease the pH level in your nutrient solution. If the pH is not sitting within acceptable range, you ar...

Professors Organic pH Up is a carefully formulated pH adjusting solution designed to optimize the pH level in your soil or hydroponic system. Ensur...