Bluelab Guardian Monitor Fans / Ventilation / Ducting It should be used throughout

It should be used throughout the vegetative stage and the first half of the flowering stage

The Bluelab Combo Meter is a conductivity

It also combines high levels of calcium with sulfates and phosphates to guarantee a balanced spectrum of plant nutrients

or soilless gardens

containers

Bluelab Guardian Monitor Fans / Ventilation / Ducting It should be used throughoutAdjustable brightness display. Large easy to read, plant safe green LED displays. Selectable values for conductivity and temperature. Simple push button pH calibration system. No calibration required for conductivity and temperature. Silent alarm for both high and low settings. Settings retained when power lost (non volatile memory). Temperature compensation. An international power supply. Water resistant design. 2 year Bluelab Guarantee (6 months on