This Laguna peat granules reduce the amount of sunlight entering the pond and help prevent green water and string algae. It also contains a gentle and natural-occurring anti-fungicide that is beneficial to pond fish and plants. In addition, peat granules provide a natural way to help lower both KH and pH levels at a safe pace. Packed in a 4-pound bag with a reclosable seal. Includes mesh media bag. Use the exhausted peat granules when potting acid-loving pond plants or simply scatter over your garden, as it makes great organic compost. Directions for use - peat granules work on the same principle as a tea bag. Place the mesh bag containing the peat wherever there is constant water flow in the pond. The bag will start to slowly release humic and tannic acids, providing a natural light filtering effect, while insuring optimum plant growth. Laguna peat granules will also help lower the ph in alkaline ponds and prevent fungal infections on fish. Measures 3-inch length by 18-inch height by 11-inch width.