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128 Posts
When you purchased your cardinal tetras, did you place them in a quarantine tank or directly into your main aquarium ? This is a very sensitive fish to acclimate to a tank and most of the time they don't show trouble / signs of disease until a few days after introduction. The price range varies but a good group of 20-30 could range from $60.00 to $100.00, a pretty stiff loss should they succumb to infection that could have been prevented with quarantining and dosing with a preventative medication. I speak from experience and others will most likely agree.
