Natural Solution: Made from organic barley straw, this treatment offers a chemical-free way to keep your stock tanks clean. Effective Cleaning: Barley straw works to break down algae and debris, leaving your water clear and fresh. Easy to Use: Simply toss the unopened bag into your stock tank - no need to open or handle messy chemicals. Long-Lasting: Each bag provides treatment for up to two months, offering extended cleanliness and freshness. Versatile Application: Suitable for use in stock tanks, automatic waterers, ornamental ponds, bird baths, and fountains. Safe for Livestock: Completely safe for all breeds of horses, cattle, goats, swine, poultry, and exotic livestock. Natural Barley Straw Algae Treatment for Stock Tanks, Ornamental Ponds, and More - Pack of 2 Package Contents: 2 burlap bags of barley straw treatment Bag Dimensions: 5.5”W x 8”L x 1.5” Usage: One bag treats approximately ten square feet of surface area Storage: Completely biodegradable bags can be disposed of in the trash or compost bin after use