There appear to be opposite views on this subject. I have a Male Beta in a small (2 gal) container, and I think he's cold or maybe just bored. He certainly isn't very animated. Rather than buy a 5-10 gal. tank and adding a heater, it is a temptation to add him to my 45 gal. freshwater tank that I keep around 76 deg. This tank,however, has two large angels, 5 zebras, and 6 tetras. Should I try it? I don't want him biting them or vice versa. What do you think?