Hanna Instruments Halo Gel Filled Bluetooth pH Electrode led Produces up to 1

Produces up to 1

Sunrise/Sunset simulation

Worm castings and zeolite help conserve water and leaching

1 x lighter leash

Professional pH controller especially designed for use with aquariums

Hanna Instruments Halo Gel Filled Bluetooth pH Electrode led Produces up to 1Halo 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