
Frequently asked questions
What does the Bluelab pH Pen measure?
It measures the pH of your nutrient solution and also its temperature. That helps you keep conditions right for nutrient uptake and root health.
What solution temperature should I aim for?
A solution temperature of 18 to 22˚C (65 to 72˚F) is recommended, as temperature affects growth rate and plant structure.
What pairs well with the Bluelab pH Pen?
Teamed with a Bluelab ppm or EC Pen, it gives you a handy, accurate system for managing both pH and nutrient strength.
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