Mushroom Cultures & Supplies › Pearl Oyster (Pleurotus ostreatus) Liquid Culture Image 1 of 2 Image 2 of 2 Pearl Oyster (Pleurotus ostreatus) Liquid Culture SGD 70.00 Sold Out! 25cc of 100% contamination-free, active mycelium in sterile syringe. Sold Out! Added! 25cc of 100% contamination-free, active mycelium in sterile syringe.