Hydroponic growing on a buffered and washed coco substrate. The advantages of Cocos Premium: ● Optimal nutrient uptake due to extra buffering step. Unique about the Plagron coconut substrates, is that they are more buffered than comparable products. ● Low initial EC value prevents calcium deficiency. Because Cocos Premium is fully flushed and buffered, a low EC value is guaranteed. ● Highest quality coco (RHP-certified). The RHP quality mark guarantees the correct quality requirements and sustainable origin of the substrate.