Bluelab Conductivity Pen rockwool Simply empty the contents of

Simply empty the contents of the original bottle and give the bottle a quick rinse

Adjustable height to 18"

and distribute EC evenly

If using outdoors

Bluelab Conductivity Pen rockwool Simply empty the contents ofThe Bluelab Conductivity Pen simply tells you that your plants have the right amount of nutrient in your solution and lets you know if adjustments are needed. To feed plants well, we need to know what we're feeding them. Start with a quality nutrient. Measuring the conductivity every day is the best way to avoid over diluting or over concentrating your nutrient solution. Completely change the reservoir solution every 7 days. Top up the nutrient level