You still need a heater to prevent temperature fluctuations, fishes hate it when the temperature jumps around. Also, here's a great source of information on ho

You still need a heater to prevent temperature fluctuations, fishes hate it when the temperature jumps around. Also, here's a great source of information on how to care for them https://www.fishlore.com/Profiles-Betta.htm https://www.fishlore.com/Profiles-Betta.htm