If you haven’t bought a small bowl yet, we highly recommend that you get a larger aquarium that holds at least 5 to 10 gallons of water. More water gives your betta fish extra room to swim around and allows you to go longer between tank cleanings before the water gets too dirty. Also, it doesn’t cost a lot more to buy a bigger tank, especially if you take advantage of Petco’s “Dollar Per Gallon” aquarium sale (where a 10-gallon tank only costs $10)
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