human
How can I tell if the fish in my tank are sick?
assistant
You should look for signs of illness such as changes in behavior, coloration, or appetite. Check the water temperature and pH levels to make sure they're normal. If you notice any unusual smells coming from the tank, it could be a sign that something is wrong. Additionally, take a sample of the water and test it with a test kit to determine what type of bacteria or other organisms may be present.