Barley straw is the dried stalk of the barley plant, commonly used in agriculture and gardening. It is a byproduct of barley grain production and is often utilized as animal bedding, mulch, or compost material. Barley straw is valued for its ability to improve soil structure and retain moisture. In addition to its agricultural uses, barley straw is also known for its role in pond management. When placed in water, it can help control algae growth by promoting the growth of beneficial bacteria. This natural method is preferred by many for maintaining a healthy aquatic ecosystem.