Hanna Instruments Halo Gel Filled Bluetooth pH Electrode pumps-and-irrigation-supplies Double-ended system delivers higher PAR

Double-ended system delivers higher PAR value with incredible uniformity

Compatible with your existing T5 HO fluorescent fixture

Trim Fast also protects your cutting equipment from corrosion while not in use

What it does: Speeds seed germination

For use with Big Boy and most RO and filter systems with up to 8 GPM flow rates

Hanna Instruments Halo Gel Filled Bluetooth pH Electrode pumps-and-irrigation-supplies Double-ended system delivers higher PARHalo 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