Choosing the right type of water is crucial for successful mushroom growth. Ideally, use spring water from a bottle or non-contaminated tap water. The quality and content of the water can significantly affect your mushroom spawn's moisture levels, which impacts their ability to colonize and grow. The perfect hydration is essential for regulating the mushroom water content within your grain spawn. Mushrooms do absorb a considerable amount of water during their life cycle, so having an appropriate source of hydration becomes even more critical. When hydrating wbs (wild bird seeds) or coir (coconut fiber), always make sure you use pure, clean water to prevent any potential contamination.