Bluelab pH Pen tent accessory This ensures that you will

This ensures that you will always be on top of your reservoir conditions

The bricks are easy to package

such as tomato plants

tested and loved by growers for decades

Bluelab pH Pen tent accessory This ensures that you willBluelab pH Pen This user friendly and hardy handheld pen will take measurements in increments of 0. 1 pH and is fully temperature compensated, so you can expect accurate readings every time. Bluelabs products are designed and built for grower environments not the lab so you can relax knowing that your pen can withstand the knocks, drops and deep water plunges that come with everyday growing. The fully waterproof Bluelab pH Pen is designed to float