Rosy red minnows tropical or cold water?

I know they aren't an obvious choice for a tank as many think they re just a feeder fish, I however have fallin in love with the 3 that has managed to evad my red ear slider, Kapa. So I have decided to setup my 26g bowfront as a species only rosy red minnow tank! However I have a few

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My Rosy Red Minnows Are Rubbing Their Heads In The Gravel

I know ppl think they are boring but I just got 10 white cloud

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