i have a silver oranda and a black moore in a 55 gallon tank. the oranda gets these red spots every once in a while on his wen. they seem to be underneath the outermost layer. as they progress the turn white and can be seen on the outside. i’ve noticed him gasping for air a lot recently. it seems to be more and more each day. he stopped after i did a water change last time, but he’s doing it again. he’s also floating, which i assume is because of the gasping for air. i assume he’s swallowing air because he can still control his swim bladder enough to go down, but when he relaxes he floats back up. i have two fluval aquaclear 50s running on the tank with established media (tank has been running for 6 months) and the water parameters are in the photo below. i’ve done a lot to save this fish because when he came home he had a white cottony growth on his head that ate away at his wen and i worked every day to treat it. it was really bad but he made it through and now it is sad to see him having another problem. i’m willing to do anything. any thoughts or advice is very much appreciated.