What temperature should a fish tank be?

The ideal temperature for a fish tank varies depending on the species of fish being kept. Some tropical fish, such as guppies and tetras, prefer water temperatures between 75°F and 82°F, while goldfish and other cold-water fish prefer temperatures between 65°F and 72°F. It's important to research the specific temperature requirements of the fish you intend to keep in your tank and adjust the temperature accordingly.

To maintain a consistent temperature in your fish tank, you can use a submersible aquarium heater or a temperature controller. These devices will automatically adjust the water temperature to the desired setting. It's also important to monitor the water temperature regularly using an aquarium thermometer to ensure that it stays within the ideal range.

Sudden changes in water temperature can be stressful for fish and may lead to health problems or death. When changing the water in your fish tank, always add new water that is at the same temperature as the existing water. You can also float the new water in a sealed bag inside the tank for a while to slowly adjust its temperature.