Do Betta Fish Need A Heater?

This can be achieved in a fish tank only using water heater. In many cases if the fish tank is too big then two heaters are used and placed in the corner of the tank.

Another important point is to achieve even heating normally the water heater is placed where the filter circulates water so that warm water gets evenly mixed with the rest of the water maintaining an even temperature. 

It is advisable that apart from the water heater you also invest some money is other equipment such as an aquarium thermometer and a filter. The aquarium thermometers come in several types but the best one is the one which shows digital reading on a small monitor that hangs on the walls of the fish tank outside. A probe is dipped into the fish tank water for taking exact reading. Using this thermometer you can prevent overheating or freezing of water so that bettas feel safe. Maintaining exact water temperature is critical of lifespan of bettas.

The best practice is to buy an aquarium heater that has a built-in thermostat. A thermostat shuts down the heater if it starts overheating the water. In some models you'll also find a buzzer that reminds you of overheating or freezing of water.

In short to create the exact environments found in wild where bettas are found normally, you must provide all the necessary arrangements so that fish feel safe and happy. An aquarium heater is one of the many things you must provide to achieve this.

Image Credits - By VivienneHarper (Own work) [CC-BY-SA-3.0], via Wikimedia Commons