Publisher's Synopsis
While the betta can survive at room temperature water, it may impair their immune system or lead to inactivity if the water becomes too cold. Since they thrive at around 79 degrees, it's important to remember that the air around the tank is always at least a few degrees higher than the actual water temperature.
The average room temperature in a home is 68 degrees, so it's crucial that you have a heater in colder months if the water temperature drops too low. Failure to do so could lead to health concerns.
Another misconception is that the betta fish does not need a filter because it is used to living in stagnant and dirty water (e.g. large puddles). Ammonia however builds up in the tank from defecation and can hurt the fish over time through fin rot and other diseases.
This leaves you with two options which are either to change the water often, or install a filter to remove the toxins from the water. The safest way to maintain the healthiest environment is through the use of a slow and gentle filter to prevent their fins from getting sucked into it.
