Disc is compacted coco peat. It expands when water is added and can be broken apart for easy distribution amongst nursery pots. This commercially endorsed growing medium is the recommended medium for the IGS hydroponics system.

Material - Natural Sieved Coco Pith
Type - Normal Disc / Jiffy Plugs (Discs covered by NonWoven cloth)
Moisture - < 15 %
EC - Low EC < 0.6mS/cm
 PH - 5.8 6.8
 Compression ratio - 5:1