*Product May Be Subject To Extended Lead Times. The UltraZap Bio Filter 50 Litre is a heavy-duty biological filtration system built for large-scale ponds, aquaculture setups, and commercial water features requiring maximum filtration performance. With its substantial 50-litre capacity, this filter offers extensive space for the colonization of beneficial bacteria that are vital to maintaining water quality. These bacteria naturally break down harmful ammonia into nitrites, and then further into less toxic nitrates, supporting a stable and healthy aquatic ecosystem. Engineered for durability and efficiency, the UltraZap Bio Filter 50 Litre is ideal for systems with high fish loads or continuous biological waste. It integrates seamlessly with pump and aeration systems, ensuring consistent flow and oxygenation. Whether for ornamental, recreational, or commercial use, this high-capacity filter is a reliable solution for achieving and maintaining crystal-clear, healthy water. Pond cap 24000L.