Mother Earth� Coco substrate contains the highest-quality mix of coco pith and coco fiber. RHP certified for quality, Mother Earth� Coco is pre-buffered and pH adjusted to neutral at 6.3�6.8. Mother Earth� Coco will promote strong root growth, populate microbial activity, discourage disease and insect outbreak and release nutrients evenly. For an optimal hydroponic media, combine Mother Earth� Coco with Mother Earth� Hydroton� or Perlite for increased production. This is uncharged inert media.