Bluelab Conductivity Pen rockwool It provides a great source

It provides a great source for readily available potassium

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

vitamins and select amino acids

and of course

and distribute EC evenly

Bluelab Conductivity Pen rockwool It provides a great sourceThe 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