Bluelab pH Pen | Waterproof Digital pH Tester for Hydroponics ENZYME'S it provides lab-grade accuracy in

it provides lab-grade accuracy in Rockwool

Digital Hygrometer/Thermometer

Easy installation — Fits standard 4‑inch ducting and carbon filters

ultra-fast drainage

Bluelab pH Pen | Waterproof Digital pH Tester for Hydroponics ENZYME'S it provides lab-grade accuracy inBluelab pH Pen: The Ultimate Handheld Digital pH & Temperature Tester Take complete control of your crop health with the Bluelab pH Pen. Trusted by commercial growers and hobbyists alike, this lab quality instruments provides fast, accurate, and temperature compensated readings of your liquid nutrient solutions. Whether you manage a sophisticated hydroponics setup, a backyard greenhouse, or a home aquarium, maintaining the perfect pH level is critical