DaKine 420 CalMag, 10 kgHey! Its your plants here. We have something to say! We know that Coco Coir is a very popular because of its high cation exchange capacity (CEC) or ability to store and exchange nutes for weed. But if you don't buffer that growing medium with calcium for strong cell walls and magnesium for chlorophyll production, we may turn yellow in protest. We can also tell you that too much sodium and potassium can cause overdosing, and that's no bueno. So do us a