As you see in my profile, I live in Bangalore and temperature here normally between 22 to 28°C.
Hence I thought it might not be necessary for me to buy a heater. But recently we were hit by a cyclone and it's quite chill with temperature around 18°C.
My betta looks usual, active, hogs food, flares and everything.
The question is will he show any signs if the lower temperature is troubling him?
Is it a must to get a heater?
Though cyclone is gone now & regular weather is expected to return from tomorrow, I just want to know.