I will never understand why people think "hardy and easy to care for" means "leave for dead and then blame the fish for dying after only 3 months". Yes, Bettas don't need to be walked everyday like dogs or a litter box cleaned daily like cats. But you can't leave them to rot in disgusting water. Even if a betta can pull oxygen from the air it is still vulnerable to ammonia poisoning, fin rot, body rot, every other disease I don't feel like listing, and stress.
I hate when people think that pulling oxygen from the air means their water quality can go to pot. Bettas need to do more than eat and breath.
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