Is This Saddle Back Columnaris?

[invader]

Tank size:30gl
pH:6.6
ammonia:0
nitrite:0
nitrate:0-5ppm
kH: no test
gH: no test
tank temp: 74 F

Fish Symptoms (include full description including lesion, color, location, fish behavior):

Volume and Frequency of water changes: Just started the tank on Saturday by cloning. Did first water change today, 30%.

Chemical Additives or Media in your tank: I have only used Stress Coat.

Tank inhabitants: 6 unknown corys (thread open in cory forum)

Recent additions to your tank (living or decoration): 6 corys on Saturday, along with rotala indica and riccia. Monday, I added new rotala and anubias.

Exposure to chemicals: None, except stress coat.

Digital photo (include if possible):

 

[WILDER]

Can't really tell with the pic, but corys are prone to bacterial infections.
Does it look like fluff going along the back of the fish coming down the sides.

 

[invader]

Yes, it does. Sadly, the cory died this morning.

If you are trying to see the picture, look at where the dorsal fin is then just look down the back, there you will see the fuzz coating the cory, going along the sides as well.

Thank you.

 

[WILDER]

Sorry my eyes are getting old.
R.I.P. bless him.
A few daily water changes and keep a eye on the fish.
Good luck.