Feeding parrot fish requires weak and low hardness water. There are several possibilities for parrot fish to turn black and appear black spots: 1 parrot fish will also appear black spots when it is frightened, and will disappear after a period of time. Parrots like old water. If this happens just after changing the water, it may be the original difficulty of water quality discomfort. Generally, water should be changed only when the water quality is poor. If the water quality is not good, it should be replaced immediately and the water quality should be readjusted. The water quality should be similar to before. Red parrots sometimes have dark spots when they grow up, but they will fade after a while. So did my last one. It'll be all right in a minute. (Because parrot fish is a hybrid of cichlid, it is not surprising that there were black spots when I was a child. During this period, we should pay more attention to water quality and feed in order to make the red parrot more beautiful, and feed more red feed such as shrimp or red. It is not difficult to choose red parrot fish. Generally, we should choose lively ones, not those that float on the water or sink under the water. It depends on whether it swims normally. Pay attention to whether the fish are injured, and don't choose those who are injured or sick. It depends on whether the body is normal and not deformed. Also, pay attention to whether parrot fish eat food. It's better to feed it at the scene and see if it eats, so it's easier to feed. Finally, be careful not to choose the red parrot, because it may be that the fish shop has used a lot of hormones to the fish, which is harmful to it and will fade after a while. So when you choose, you should choose the natural red one. Precautions for feeding parrot fish: Due to the natural oral healing of blood parrots (especially Class A and Class A blood parrots), the ability to breathe by introducing water through the gills is reduced by half. Therefore, the respiratory function of gills has become an obvious "fatal injury"! Once gill injury or poor oxygen inhalation process will directly affect the physiological health of blood parrot. Therefore, nourishing parrots should maintain better water quality and provide sufficient oxygen than raising other fish. In particular, it is very important to reduce the dissolved nutrients in water (to avoid eutrophication), to avoid gill diseases caused by a large number of bacteria, and to maintain the ability of gill cells to absorb oxygen effectively and efficiently. As for charging and pumping, in addition to selecting high-efficiency pumping motors, it is also necessary to prepare uninterrupted pumping systems for areas prone to power outages in summer in case of emergency.