Mineral wool is a man-made fiber made by spinning glass, ceramic, or molten minerals (rock or sand) at high temperatures. It results in a fibrous, porous material used as a growing media in hydroponic systems. Benefits include ease of use and efficient capabilities of holding water and air for root support. It is, however, hard to dispose of, and the dust from the fibers is unhealthy if inhaled. The pH of mineral wool is naturally high, so growers will need to monitor pH in order to maintain a healthy range specific for each plant grown with this medium.
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