Note: 1. Rinse with cold water for a day before use and then drown it into the tank. Place the skull anywhere you want the tank (no maintenance required). Fish tank resin crafts, non-toxic and tasteless, will not affect the health of the fish. Soaking in the aquarium for a long time, no change will occur, so use it with confidence. The aquarium decorative skeleton can be used in aquariums, attractive aquariums, aquariums and other household items.