Can you keep tropical fish in a cold water tank?

Here's why:

* Temperature Requirements: Tropical fish are adapted to live in warm water, typically between 75-82 degrees Fahrenheit (24-28 degrees Celsius). Cold water tanks are usually kept between 60-70 degrees Fahrenheit (15-21 degrees Celsius).

* Physiological Differences: Tropical fish have different metabolic rates and physiological processes than cold water fish. They need warmer water to digest food efficiently, maintain their immune system, and stay healthy.

* Stress and Illness: Keeping tropical fish in cold water can cause them significant stress, weaken their immune system, and make them susceptible to disease. They may also exhibit lethargy, reduced appetite, and difficulty breathing.

In short, putting tropical fish in a cold water tank would be cruel and likely lead to their death.

If you want to keep tropical fish, you'll need to invest in a heated tank and ensure the water temperature stays within their optimal range.