I have a fairly newly acquired helianthus congo, and his mouth is a little white around the lips...it seems to come and go, and since he is still eating plenty, i am inclined to believe he may just be fighting...i've seen him go at it a little with my brichardi and transcriptus, though i haven't actually witnessed them going at eachothers mouths...should i wait to see if he stops eating before i decide to treat the tank? i have melafix and pimafix, and i am pretty sure one of them would do the trick if it is mouthrot...any suggestions?