I left for 2 hours and when I came home I noticed my rtc's mouth is all bloody. At first I though that he attacked the other fish but they are all in perfect condition. Is this some sort of disease or parasite? What should I do?
It is hard to see the redness you refer to. If he and his tankmates eat well and behave normal, perhaps it is too early to think there is a problem. External redness usually means a bacterial infection... from something light and external, such as Greenbud successfully removed with a vey mild natural anticeptic pimafix, to lethal and internal, such as hemorragic septicemia.
I had the water tested today and everything was fine. I was going to get some pimafix but they were out of stock. I have bumped up the temp and added some salt, anything else I can do?