Most aquarium fish require a heater because they’re used to tropical temperatures, but did you know there’s a whole class of coldwater fish that are perfectly fine at room temperature? In this article, we cover the 10 coolest fish that can live without an aquarium heater.
Betta fish are known to be fierce fighters, but did you know you can add tank mates to their aquarium? Depending on your betta’s personality and the size of the tank, he can peacefully cohabitate with other fish and invertebrates. Check out our top 5 list of favorite tank mates for you and your betta fish to enjoy!
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