Model A: With cover only Model B: With cover and timer Description The UV lamp achieves the purpose of purifying water by reducing floating algae, bacteria, viruses, fungi and protozoa in the water. Efficient, low noise, more suitable for fish farming. The device effectively kills harmful bacteria and algae in aquariums and ponds, providing a healthy environment for fish farming. Bacteria and viruses in the water will be killed in a short time. Suitable for water treatment of aquarium, fish pond, swimming pool, etc. With high quality lamp tube, the normal service life is 8000 hours. Open UV-C sterilizer for use directly in water. Best placed in sump tanks ;