I have a divided tank with 2 bettas, if one dies, should I do a 100% water change? Also, if I want to add another betta to the tank when one dies, should I do a 100% water change?
Yes, it couldnt hurt along with a good rinse of everything to be sure whatever he died from doesnt spread to the other. But, of course, try not to be so sure one will die. Take good care of your fish and do weekly water changes!
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