Can you put a fish in well water?

No, it's not a good idea to put fish in well water without proper treatment. Well water can contain high levels of dissolved solids, such as calcium, magnesium, and iron, which can be harmful to fish. Additionally, well water may also contain bacteria and other microorganisms that can cause disease in fish. If you want to keep fish in an aquarium or pond, it's best to use treated tap water or filtered rainwater to ensure their health and well-being.