My Betta, Don Corleone, (lol!) is living by himself in a 5.7 litre tank. (not sure how big that is in gallons, but it is significantly bigger than those eenie - bitty cups in the pet store).
I live in Australia, so it's never very cold, and the tank is a roomy size but not so big the water gets very cold. Most of the time the water is room temperature to warm.
I went to the pet store today to find a heater, but the only one they had that was the right size for my fishe's tank was quite expensive. I won't hesitate to get it if there is no other way, but have any of you been able succesfully put a Betta in a tatnk with no filter, and the fish has lived a long happy life?
I'll post pictures of my tank and Don Corleone soon, when I remember to charge the battery of my dads camera!
