Diamond tetras are on the smaller end of the size spectrum when it comes to freshwater fish. We recommend a tank size of at least 15 gallons when keeping these fish. That should be enough to keep a smaller group of three fish.
That said, more space is never a bad thing. These little creatures are peaceful, but they can also be very active. A larger tank will create more swimming space while also making it easier to maintain water conditions.
Speaking of water conditions, it’s important to create the right environment for your fish when it comes to parameters..
Diamond tetras come from shallow rivers and streams in South America, and prefer warm waters that are slightly neutral. This species can survive in alkaline waters thanks to their hardy nature, but slight acidity can do a lot to help bring out their beauty!
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