Canna CalMag 1L 5L Calcium Magnesium Cal Mag Nutrient Supplement,hydroponics
Canna Calmag agent can then be used to raise the EC back up again to 0.4. How to Use Canna Calmag Agent. Canna Calmag Agent can be used to raise the background EC of soft water or reverse osmosis (RO) water up to a level of 0.4.