Bluelab - 2.77 EC Calibration Solution Bulky Best for: Hydroponic growers looking

Best for: Hydroponic growers looking to boost photosynthesis and close the carbon gap without gassing systems

Safety: Built-in thermal overload protection device

low-noise design

Pipework: 6mm internal diameter (9mm external)

Bluelab - 2.77 EC Calibration Solution Bulky Best for: Hydroponic growers lookingBluelab 2. 77 EC Calibration Solution Laboratory Standard Conductivity Testing Best for: Growers who need to keep their EC meters accurate and their nutrient readings trustworthy Our thoughts This isn't a glamorous product, but it's absolutely essential if you're serious about consistency. Your EC meter is only as good as your last calibration check. Bluelab solutions are made to laboratory standards, and this one ensures your probe is reading true.