Bluelab Commercial pH Pen DangerousGoods Packaging may vary

Packaging may vary

cool place out of direct sunlight

Flat box industry standard size

Efficient: no more sediment

Perfect for usage in schools

Bluelab Commercial pH Pen DangerousGoods Packaging may varyBluelab Commercial pH Pen The Bluelab pH Pen is a hardy, compact, and accurate pH and temperature pen for using in nutrient solution. Use the pH pen to quickly and accurately know if your solution is too acidic or alkaline, or too hot or cold. Designed for everyday use, the Bluelab pH Pen helps you to keep your plants in the optimal pH and temperature range so that your plants can thrive. Getting started is easy. Follow the instructions to hydrate and