Hanna Instruments Halo Gel Filled Bluetooth pH Electrode ventilation Energy efficient: To replace T5

Energy efficient: To replace T5 54W fluorescent HO lamps

Plants and gardens must have accessible calcium and magnesium to successfully grow

The microbes are activated when hydrated

Directions & Dosage Rates: Shake well before using

Hanna Instruments Halo Gel Filled Bluetooth pH Electrode ventilation Energy efficient: To replace T5Halo Gel Filled Bluetooth pH Electrode This Bluetooth enabled electrode turns your Apple or Android device into a full featured portable pH meter. HALO gives you the ability to measure, chart, record and share your data right from your phone. HALO enables the gardener to automate their pH and temperature logging efforts. This helps keep gardeners accountable and focused. You can stop relying on hand written data logs when you start using the HALO. pH