A new little unicorn has developed a dark area on one of his gills. Here's a shot of him.
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He's eating more and more so am thinking it will go away on it's own but figured I would post this to see if anyone else has seen this on their tangs.
Thanks.

He's eating more and more so am thinking it will go away on it's own but figured I would post this to see if anyone else has seen this on their tangs.
Thanks.