Gosh! Thank you very much for that information!
I was worried about the water temperature, because in the summer my son likes to run the cooler constantly. If his water gets too cool, I might try the reptile heater (we happen to have one), or maybe have a light bulb close enough to the vase to provide a bit of warmth? What do you think?
I haven't seen a female betta- sounds fascinating, those stripes. I'm glad I didn't put one in danger, though. I'm learning so much here. Maybe I'll get a female instead of another male, giving her her own living quarters, of course