Originally Posted by BettaBaybee
@ Micho, it's one of the "BettaKeepers" mini tanks, the triangular one. You can see a pic online, there's a bunch of them posted if you Google BettaKeeper. My home stays at 74 - 76 degrees, I'm not really sure why everyone keeps saying that they use heaters. Bettas usually do fine within that temp. Maybe once Tiny gets bigger I will purchase a larger habitat, but she is really really tiny. Shouldn't this be plenty of room, for now?
Did the research, it holds 40oz of water which is 0.3125g. . . Bettas are tropical fish, and they thrive when the temperature of the water is around 78F ~ 82F, your house is at 76F give or take, you have to take into consideration that air is warmer than water, so minus 5F off of that and the water temperature is around 71F, not exactly toasty to Bettas.
And the reason why people use heaters is that not only to heat the water but to keep the temperature stable, people use heaters in goldfish tanks (coldwater fish), because they water might too cold even for them, and to stabilize the temperature rather let it fluctuate throughout the day (which could kill the fish).
Even though she's tiny, it's like saying a baby can live in a closet. Not really, no. I highly suggest you upgrade to 1 gallon or bigger, 0.3g is too small to heat safely, too small for a fish in general, even for a baby fish. With smaller tanks comes with more water changes, why we make these water changes is to keep the ammonia levels down.