*Product May Be Subject To Extended Lead Times. The UltraZap Bio Filter 50 Litre Including Bio Balls is a high-capacity, professional-grade biological filtration system designed for large ponds, aquaculture systems, and commercial aquatic installations. With a generous 50-litre chamber filled with high-performance bio balls, this filter delivers superior biological processing by providing maximum surface area for beneficial bacteria to thrive. These bacteria are essential to breaking down harmful ammonia and nitrites into safer nitrates, ensuring clean, balanced water for fish, plants, and other aquatic life. The included bio balls enhance filtration efficiency, increase oxygen exchange, and reduce maintenance by promoting long-lasting bacterial colonies. Built for durability and optimal performance, the UltraZap Bio Filter 50 Litre with Bio Balls is the ideal solution for environments that demand dependable, large-scale water filtration with minimal effort. Pond cap is 24000L. Includes 735 Bio Balls