What should I do if I forgot to wash the aquarium sand before adding it to the tank?

If you forgot to wash the aquarium sand before adding it to the tank, you can try to remove it by carefully scooping it out with a net or siphoning it out with a gravel vacuum. It's important to remove as much of the dirty sand as possible to prevent cloudiness and potential harm to your fish. You can then rinse the remaining sand thoroughly before adding it back to the tank. Remember to monitor the water quality closely in the following days to ensure the health of your fish.