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My betta has changed color and has gained some black it looks like under his gills. His color looks more foggy than before and his eyes have a grey spot on each of them. I put him in a larger and filtered tank last week as well as changed his food. I'm wondering if he is ok and how to help his gills enter image description here

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    Possible duplicate of Is my betta dying/sick or just sleeping? – trond hansen May 8 at 4:38
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    what are the readings of your latest water test ammonia-nitrite-PH,what are the size of your tank is it filtered and heated – trond hansen May 8 at 4:46
  • Is he eating normally? Bettas can change coloration when you put them in a different tank. – Manuki May 8 at 16:54
  • He is eating fine. His color is changing to a yellow color with grey spots and the black has changed to spots. He is in a 1.5 gallon tank that is filtered but not heated. I should test the water again. He flairs his gills everytime I go up to his tank now. Not sure if that is a good thing or a bad thing – Falicia Krupinski May 16 at 1:37
  • A betta is a tropical fish. It needs to have water heated to around 24 - 27 degrees C. Any problem with a fish should be followed up with a water test. It's almost always the cause. – Henders May 29 at 8:13

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