Sore On Blue Gouramis

[dylandeputronroberts]

Have got two blue goramis one is bigger then the other and the other one is tiny. The bigger of the two has got a brown orange colour spot on hes upper fins. It is quite noticable around about the size of a mole dimple. Been there for about 4 days it doesnt seem to be affecting hes behaviour he seems normal.
Was wondering what this was and what to do. None of the other fish have it.

In the tank are two balloon mollies
one common pleco
2 blue gouramis
2 assorted mollies
1 guppie
1 siamese fighter male
one catfish not sure what type
2 platties
2 rasboras

Like to know what to do thanks.

 

[sylvia]

You should never, ever keep bettas (siamese fighters) with other gouramies or guppies.

What size tank is this? What are your water parameters?

Can you get a picture of this 'spot'? Does it protrude? Is there anything white or fuzzy on/around it? Did it appear suddenly? Are the scales still normal? Are all this fish' fins still intact? Any sign of black, red or white edging to the fins or red streaks on the body? Made any changes to the tank recently or had any deaths?