Here's why:
* Cold-Blooded: Goldfish are cold-blooded, meaning their body temperature fluctuates with their environment.
* Metabolic Slowdown: When water temperatures drop, their metabolism slows down, affecting their ability to digest food and breathe properly.
* Immune System Weakness: Cold water weakens their immune system, making them more susceptible to diseases and infections.
* Hypothermia: Prolonged exposure to very cold water can lead to hypothermia, ultimately causing death.
Optimal Temperature Range:
* Ideal: 68°F - 72°F (20°C - 22°C)
* Tolerable: 55°F - 78°F (13°C - 26°C)
What to Do if Your Water Temperature Drops:
* Heat Source: Use a heater designed for aquariums to raise the water temperature.
* Gradual Change: Avoid drastic temperature changes, as this can shock the fish.
* Monitor Water Quality: Cold water can increase the risk of ammonia and nitrite buildup, so monitor water parameters regularly.
Important Note: If the water temperature drops significantly, take immediate action to raise it and consult a veterinarian or fish expert for further advice.