100% natural and organic. Each block weighs around 4.5 to 5 kg. After watering, it will reach a volume of 70-75 Litters. High-quality coconut coir with low EC and pH values. Provides adequate aeration and drainage. It only comprises coconut pith and fibers. Our coco coir products are organic, guaranteed to be of high quality, and contain minimal salt. Washing repeatedly with fresh water produces an extremely low EC level. Peat moss, rockwool, and perlite can all be substituted with completely natural, renewable alternatives.