Bluelab PPM Conductivity Pen Containers + Support It requires no tools for

It requires no tools for assembly

carbohydrates

so it drops into most existing injection setups

and yields

Bluelab PPM Conductivity Pen Containers + Support It requires no tools forBluelab PPM (Parts Per Million) Pen Testing Meter for Hydroponics and Solution Measuring Bluelab PPM Pen is the latest innovation for hand held conductivity meters and the ultimate handy solution for measuring conductivity. Hydroponic growing lets you give the best care possible to your plants. The quality of care is in your control. The Bluelab ppm Pen provides a compact, quick and handy way to manage the success of your crops to ensure they have the