Red spots on Clown Knifes fins

[Andri Pogo]

Noticed some red spots on my 3 Clown Knifes, does anybody know what it is and what to do

 

[Miles]

Aggressive tankmates? Looks like he has some bites and other issues.. the red ulcers are likely wounds. Notice the multiple knicks and dings on the fish.

 

[Andri Pogo]

no i have not noticed any agression in the tank. But might well be that the CK´s fight each other during the night..

but i did a 40% water change and added salt to prevent any further damage to the CK´s...
If the markings are wounds, how long does it take for them to heal ?
Just weird that the red spots are on all the knifes and only on the fins (which are a little messed up)

 

[LittleBigAl3]

i had the same thing happen to my bichir. all i did was turn the temp up to about 82. it went away quickly.

 

[killarbb]

i like salt and heat.......

but i would also consider having some melafix around. just in case