2, should not be placed behind the sofa. Traditionally, it is unlucky to take water as the backing, because it is impermanent and difficult to stabilize. In fact, the modern health concept holds that the sofa is a place to rest and talk, and there is a fish tank behind it, which will make it difficult to concentrate, and there are also unsafe visual psychological hints.
3. Keep the fish tank clean on weekdays so as not to affect the fortune. Fish should be replenished when they are dead, or they will be scrapped. But if they are all dead, they should not be raised at all, because it means that it is not suitable for raising fish or the home environment is not suitable.