Apera GroStar GS1 pH Pen AI31020 The Bluelab pH Pen is

The Bluelab pH Pen is the latest innovation for hand held meters

5 ml – 2 ml per gallon of nutrient solution

A continuous shower of CO2 directly onto your plants is the most efficient way to deliver CO2

The HI98131 is a slim

Apera GroStar GS1 pH Pen AI31020 The Bluelab pH Pen isAI11010 GroStar GS1 pH Pen Lab grade instruments designed specifically for growers! Includes: 2 year warranty (instrument) 1 year warranty (probe) pH 7 & pH4 calibration solution (50ml bottle each) KCL storage solution (10ml bottle) Lanyard and user manual Features: Measures pH and temperature Premium probe technologies and materials ensure high accuracy and durability with minimal maintenance Easy to use design and fast calibration adjustment Double