Corydoras are NOT Janitors: Why You Need 6 of Them (And Why Sand is Mandatory)
Walk into any fish shop in Malaysia, and you will see a tank full of cute, whiskered fish wiggling on the bottom. The shopkeeper might tell you: “This is a cleaner fish. Buy one. It will eat the poop.” Please, do not listen to that advice. The Corydoras Catfish (“Cory”) is not a vacuum cleaner. […]
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