Hobby EC Pen Size:Grow Gadgets EC Pen Near-unlimited shelf life thanks to

Near-unlimited shelf life thanks to the fermentation process

while high-quality zips and seams keep the space completely light-sealed

The SMS Hybrid Controller Pro 4A gives growers a single point of control for the kit that keeps a tent stable

pH and water level regularly

Hobby EC Pen Size:Grow Gadgets EC Pen Near-unlimited shelf life thanks toKnow exactly how strong your feed is before it hits the roots The Grow Gadgets Hobby EC Pen is a straightforward handheld meter that reads the electrical conductivity (EC) of your nutrient reservoir, giving you a fast, honest check on how concentrated your feed actually is. It's the entry level way to stop feeding by eye, dropping the probe into the tank or run off and reading the strength in seconds so you can catch a mix that's crept too hot or too