Bluelab pH Pen shut off CO2 when turn

shut off CO2 when turn on exhaust fans

1 static brush by Harvest More to sweep up pollen

Best Practices Shake well before use

Stack helps correct minor potassium deficiencies

Use the starter plugs for your start prior to transplanting into our larger growing blocks

Bluelab pH Pen shut off CO2 when turnA hardy, compact pH and temperature pen Perfect for quick and easy pH and temperature readings direct from your solution Fully waterproof not just water resistant Simple two point calibration process for accuracy One year peace of mind warranty Automatic temperature compensation for accurate readings everywhere Auto off function to extend battery life 1 AAA battery included simply power on and go