Bluelab Replacement pH Probe for Combo, Guardian and pH Controller Grow Tents Allow adequate ventilation in all

Allow adequate ventilation in all work areas — use in well-ventilated spaces or with local exhaust ventilation

Each screen comes with hardware so you can easily mount your new screen

This compact size ensures a seamless fit in most setting

This gauge is great for use with water systems

Bluelab Replacement pH Probe for Combo, Guardian and pH Controller Grow Tents Allow adequate ventilation in allBluelab Replacement pH Probe: Durable & Accurate pH Measurement for Your Bluelab Devices Keep your Bluelab pH devices performing at their best with the Bluelab Replacement pH Probe! This durable and affordable probe is compatible with a range of Bluelab meters and controllers, providing accurate and reliable pH measurements for optimal plant growth. Why pH Matters for Plant Health: pH plays a critical role in nutrient availability. Plants can only