Can you put cold water fish in a tropical tank?

Here's why:

* Temperature Requirements: Cold water fish thrive in temperatures between 41-68°F (5-20°C), while tropical fish prefer 72-82°F (22-28°C). Keeping a cold water fish in a tropical tank will be too warm and stressful for them.

* Water Chemistry: Cold water fish often prefer different water parameters (pH, hardness) than tropical fish. These differences can be detrimental to the health of the cold water fish.

* Disease Risk: Mixing fish from different temperature ranges can increase the risk of disease transmission.

* Behavioral Issues: Tropical fish are typically more active and aggressive than cold water fish. This can create a stressful environment for the cold water fish, which may not be able to compete for food or space.

Instead of putting cold water fish in a tropical tank, consider setting up a separate tank specifically for them. This will ensure that they have the appropriate temperature, water chemistry, and environment to thrive.