Angle fish with red fins?

Question

I've Had an Angle fish for about three years now i got him from walmart when he was about an inch big. now hes rather large and a little old. but he's been in perfect health the entire time except for a bit of ick about a year back.

now i just noticed today that the base of his left fin is all red and inflamed. it doesn't seem to be hurting him because he's moving around and eating fine, none of the other fish show any problems.

i just want to know if i should be worried.

thank you for your help!

Answer 1

This is generally septicemia, which is a bacterial blood infection.  I would start with more frequent water changes and a gram negative effective antibiotic like Maracyn 2, Furan 2, Kanaplex, Triple Sulfa, Trisulfa, Metronidazole, Hexamit, Flagyl, or others.  It would also be very beneficial to soak the fish's food in the medication before adding it to the tank.  Remove any activated carbon from the filter during treatment, and if using minocycline or tetracycline based medications, keep the tank dark as these drugs degrade with exposure to light.

Septicemia: http://www.aquariumhobbyist.com/guppies/...

http://www.wetwebmedia.com/CypriniiformP...

http://home.nps.gov/piro/naturescience/i...

Answer 2

This might be a number of things. it could be "red pest", a form of fin rot, a bacterial infection, etc etc. Pictures would help.