Why do swallowfish peck the water surface if the water in the tank is not dechlorinated and poured directly into the tank, it will easily lead to swallowfish poisoning and pecking the water surface. Therefore, it is best to expose the tap water to sunlight or shade drying for a few days to dechlorinate before use. If you find the swallowfish floating on the water surface and keep pecking the water surface, it may be caused by the lack of oxygen in the tank water due to long time without water change, then you should change the water for the swallowfish and enhance the oxygen in the water with oxygen equipment in time. When the water quality in the tank deteriorates, breeding a large number of bacteria and toxic bacteria, resulting in swallowfish infected with germs, resulting in swallowfish pecking the surface of the water. At this time, you also need to change the water in time, and then use special medication to deworm the swallowfish.
