Bluelab Replacement pH Probe for Combo, Guardian and pH Controller grow-light-bulbs The controller is compatible with

The controller is compatible with 315W

The more than 100 listed pests it controls covers the most common commercial and home garden pests

We’ve engineered this OMRI and CDFA-OIM certified solution with freshwater fish protein hydrolysate and soy protein hydrolysate

ROOT DRENCH - Add 1 Tsp to 1 Tbsp Insect Frass per gallon of water

Bluelab Replacement pH Probe for Combo, Guardian and pH Controller grow-light-bulbs The controller is compatible withBluelab 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