Check the listing for details. DaKine 420 Cal Mag Supplement. Condition: New. Listed at 29.00 USD. Dakine 420 Cal MagDakine 420 Cal Mag is perfect for coco growers! We know that Coco Coir is a very popular because of its high cation exchange capacity (CEC). But, if you don’t buffer that growing medium with calcium for strong cell walls and magnesium for chlorophyll production, your plants may turn yellow in protest. We can also tell you that too much sodium and potassium can cause overdosing, and that’s not good. So do us a favor and treat our Coco Coir (or whatever growing medium you use) with CalMag. It’s a delicious 12-2-12 product containing 6% Calcium and 3% Magnesium for consistently beneficial results.With Dakine 420 Cal Mag your plants will reach a new high!Dakine 420 Cal Mag provides your plants with everything they need in the final phase of the grow cycle.12-2-12 – Cal/Mag contains 6% Calcium and 3% Magnesium for consistently beneficial results.100% Water Soluble – Crystal clear, won’t clog your lines, plug your tips, or leave residue in your reservoir.Increases Yield – CalMag is proven to significantly increase plant yield