This is a new development within last week. I have had this fish for over 3 years and it has always been healthy. I noticed these red patches on its underside a few days ago, but it does not seem to spreading. The belly area also has a red patch but the flash washed it out.
I feed a lot and use selcon/vitachem with pellets and frozen foods. I don't want to move the fish and cause it stress, but IDK how lethal this diseases is once it starts.
Best course of action? Wait it out? Transfer immediately to QT and treat with furan-2 and kanaplex? Does metro+focus do anything for septicemia?