G.A.S. Intelligent Humidity / VPD Controller for SonicAir Pro Humidifier Bulky and seaweed extract

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There are 4 basic modes of operation which are as follows:

PMT works best as a preventative measure

pH Down is a straightforward solution for growing media and reservoirs that become too alkaline due to natural changes in the environment

G.A.S. Intelligent Humidity / VPD Controller for SonicAir Pro Humidifier Bulky and seaweed extractControl the Humidity & VPD in Your Grow Room for Optimum Plant Growth Please note, this is only compatible with the SonicAir Pro Humidifier The GAS Intelligent Humidity Controller takes care of the humidity levels in your grow room, for faster growth rates and happier plants. Air temperature and humidity are the two factors that affect something called Vapour Pressure Deficit (VPD), which is literally the "drying" ability of the air. For plants to