human
How can I tell if the fish in my tank are sick?
assistant
One way to determine whether your fish are ill is to observe their behavior. If they appear lethargic or uninterested in food, it could be a sign of illness. You should also check for any changes in water quality such as increased ammonia levels, cloudy water, or discoloration. Additionally, you may want to take a sample of your water and have it tested by a local aquarium store.