Hy-Gen Coco Peat is a completely natural growing medium made from coconuts, a renewable resource. It’s ideal for hydroponics, seed raising, soil improvement, and potting mixes. This coco peat is pre-flushed to ensure low salt content, pre-buffered with calcium and magnesium, and pH stable. The compressed blocks are both economical and easy to use. To use, simply place the block in a suitably sized container, add water as per the instructions, and allow it to expand to its full volume. Hy-Gen Coco Peat is a 100% natural Growing medium: Calcium & Magnesium Buffered Excellent Drainage Low Salt & pH Stable Suitable for hydroponics, Soil Improver & Potting mix High water holding Capacity & Air Fill Porosity No Harmful chemicals added Premium Quality