Another belief that many first time betta keepers have is that bettas can live at room temperature and that bettas don't need heaters. However, unlessyou live in the tropics where the temperature is 80F year round, then you do need a heater. If you don't believe me, here is the current temperature,on 24/7 so you can always check, in the heart of the betta's home in Southeast Asia.
This myth most likely came out because it makes betta keeping seem much more convenient, thus making buying a betta more appealing. I'veheard many petstore employees telling customers that bettas are very easy to keep, that all you need is a bowl, food, and water conditioner. Bypitching bettas in this manner, they become a much more appealing pet. "A beautiful pet that requires barely anything, why not get one?" If thecostumer was told the truth that bettas are tropical fish that need a heater, it would make the purchase less appealing.
The box often says that small tanks are great for beginners and that small tanks are easier to maintain. However, the opposite is actually true. Inorder to maintain good water quality, one would have to do 50% water changes 2-3 times a week. Not only is this a big hassle for the owner, but italso causes unecessary stress for the betta. In addition to that, it is difficult to properly heat tanks smaller than 2.5 gallons without harming yourbetta. Just remember, vases are for flowers and bowls are for cereal.