Enhance your filtration system with Oceanmax Plastic Bio Balls Filter Media. This 500g pack contains 50 lightweight, durable bio balls designed for optimal beneficial bacteria colonization. Suitable for both freshwater and saltwater tanks, as well as ponds, these bio balls break down waste, improve water quality, and help maintain crystal-clear water. Easy to clean and reuse, they offer a low-maintenance, high-efficiency solution for any aquatic setup.