Just like with any other living thing, temperature regulation is important for fishes
if they are to live healthy and full lives. In fact, the right temperature is even more important for them because they are cold-blooded creatures, which means they rely heavily on their surroundings to regulate their body temperature. They don't have the capacity to regulate their own body heat, unlike for us warm-blooded folks.
Thus, it's necessary that you install a heater in your aquarium, especially if you live in a cold area and you own tropical fishes who are used to a warmer climate. A good kind of heater to use is the Azoo Titanium Heate from Pet Store
r. Because it is made with titanium, it does not corrode from exposure to acidity or alkalinity. It also does not corrode from exposure to salt, making it usable for either saltwater or freshwater tanks. The Azoo Titanium Heater is also equipped with a sensor for water, so if it gets taken out of the water - either accidentally or by choice - the power gets automatically cut off. This significantly decreases the chances for overheating. It is safe to use within your home, and at 100 watts, its energy consumption is quite low.
The Azoo Titanium Heater comes with indicators that are easy-to-read and user-friendly. No fumbling and scratching your head in confusion with this product!AZOO Titanium Electronic Heater 100 Watt *US Version*
Adapts the latest electronic heating control technology. Temperature control range 70~92°F, ±1°F Titanium tube body, free from acid or alkaline corrosion, suitable for both salt water and fresh water aquariums.
With built in sensor, if the tube accidentally removed from the water, the power will be cut off automatically. "Heating" and "Power" indicators, easy and safe to use.