Anglefish Base of Pectoral fin red

Update: Hi Everyone, I took some pics and a movie of the angles to a reputable shop and they confirmed that it is septicemia. I have put both angles in an hospital tank and added Furan 2 by API (recommended by an angle fish expert at the shop). Will need to wait 24 hrs to add another dose. My black angle seem to have take a turn for the worse, having issues staying afloat. Keeps going on its side, upside down etc. It is suggested that it might be developing a secondary infection like dropsy. Also i am now seeing some fin rot as well.
Thanks everyone for yr feedback. Now it matter of keeping an eye on these two.
 
Hi Alan, thanks for the reply. I am now following the instruction for Furan. Basically add does, wait 24 hrs, add another, wait 24hrs and do water change and repeat. I researched Furan 2 on other forums and people seem to have success on this. Pimafix I stopped using.
 
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