What is wrong with my Oscar !

[Macenzi]

I just seen it today also he is breathing heavily


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[DBLN8]

Hard to tell from those pics loos like a fungus infection, whats your water parameters? (ammonia, nitrite and nitrate) whats your water change schedule?

 

[ska_kid]

Yup^^^

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[ska_kid]

Your no3 or ammonia maybe high

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[Macenzi]

All the other fish are perfectly fine, ammonia 0 nitrite 0 nitrate 20


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[DBLN8]

Try and get a better pic of the spot on the fish.