I have a betta fish who is three or four I can't remeber, anyway I have never let the water sit, I have let his bowl get so dirty you can't tell I have a fish, he has lived for weeks in just over an inch of water at a time and his normal home is a half gallon tank.
I've never used nets to get him out of the tank, I've always used my hands, but I do use betta plus water treatment, is it just my fish?
He has never been sick either, I've other betta's too and they all lived up to three years or more.
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