Thai goldfish prefer water temperatures between 75 and 80 degrees Fahrenheit. In Thailand the temperature is hot year round. This is significantly higher than the temperature requirements of goldfish from other regions, such as China, or the USA. 

If the water temperature is too low, your Thai goldfish may become sluggish and lethargic. This may cause them to lose coloration. They may also be more susceptible to disease. If the water temperature is too high, your Thai goldfish may become stressed and develop problems with their gills.

It is important to maintain a consistent water temperature in your Thai goldfish aquarium. You can use a heater to keep the water temperature within the recommended range.

Here are some tips for keeping the water temperature in your Thai goldfish aquarium consistent:

  • Place the heater in the tank so that it is not directly exposed to the water flow.
  • Set the heater to a temperature of 75-80 degrees Fahrenheit.
  • Monitor the water temperature regularly and make adjustments as needed.
  • If the water temperature drops below 75 degrees Fahrenheit, turn on the heater.
  • If the water temperature rises above 80 degrees Fahrenheit, turn off the heater or open the tank lid to allow the water to cool.

By following these tips, you can help to ensure that your Thai goldfish have a comfortable and healthy environment.