Originally Posted by FloridaBettas239
Usally you dont need a heater on a 1 gallon or even a 2 gallon aquarium.. Unless your house inside temp is getting below 69 degrees
Bettas are fine with 70-80 degree temps. I have even seen them live healthy in 67 degree water... but it dont hurt to have one
Well bettas should never really be in water below 76, so I would say get a heater. In small tanks especially the water temperature fluctuates a lot more so it is best to have a heater to keep in steady and safe, in my opinion.
I don't think any thing less than 75-76 is okay, and I definitely would not recommend anything like 67 degrees, that is ten degrees too cold.