Atami Washed & Buffered Cocos 50L COCOS WASHED & BUFFERED is a substrate composed of 100% washed and buffered coco fibre that contains no fertilizers, which guarantees a very low electrical conductivity (EC). This substrate offers all the benefits of growing in the high quality Atami Cocos, but with no fertilizer which allows you to apply the chosen nutrition right from the start of growth. For this reason, COCOS WASHED & BUFFERED is also ideal for seedlings and cuttings.