Poorly Oscar

[Ady Bowers1]

Hi,

I have an Oscar approx. 10inch. Other fish in the tank are fine but he isn’t too good. Usually front of tank ready for food. Now behind the roots on the bottom. Mucus trailing from body, not loads but fair bit. Still taking a bit of food but not enthusiastic at all. Filter and water change done recently. Any ideas of treatment. All advice appreciated.

Thanks.