wound

I have a mixed community tank and a few days ago noticed a single white spot on the head of one of my black mollies. I took a photo to the local shop who said it was white spot, having never had this in the tank yet I assumed they knew what they were talking about and got the treatment they...

I have a ten gallon freshwater tank with one gold and one blue gourami. I just looked in to feed my fish and sudden there's this large mass or wound protruding from the gold gourami's side! I'm sorry I did not test the water parameters yet but I will after I finish typing this. The aquarium has...