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I just noticed my purple dottyback has a white stripe down his left side that he didn't have before. He acts ok, swimming,eating ect. Anyone have any ideas what this is?
Do you have any open/unprotected PH's or intake tubes? The marking looks very symmetrical like the shape from a round tube....
Keep tabs on it for fungal and bacterial infections. Providing the water specs are good and you are feeding a good fortified diet, it should clear up in no time. If you aren't already, might want to add some Zoe or Selcon to it's food for little while.