Bluelab pH Soil Pen - Waterproof Digital pH Meter Plantmax With its 360-degree free rotation

With its 360-degree free rotation capability

In hydroponics

or ducted installation

aggravate pre-existing skin conditions

Growing in less fertile soil its recommended to use more frequently

Bluelab pH Soil Pen - Waterproof Digital pH Meter Plantmax With its 360-degree free rotationProfessional pH Testing for Soil and Growing Media The Bluelab pH Soil Pen is a rugged, fully waterproof digital pH meter designed specifically for growers. Get accurate pH and temperature readings in soil, coco coir, potting mixes, and nutrient solutions with this versatile, professional grade pen. Why Choose the Bluelab pH Soil Pen Fully Waterproof: Not just water resistant built to withstand deep water plunges and harsh grow room conditions