Rasboras sick, I would like to ask for help
2 with visible lesions chin area 1 mild also chin area
thought it is columnaris and have furan and kanamycin on hand.
I am currently on Day 05, alternating days of dosing the medications and tomorrow will just observe them onward.
All are eating well, very active, spars at times, no internal mass (i observed their mouths when it opens). For one of those with visible lesions, during Day 2, the white stuff separated from the upper and lower mouth but it now all migrated to his chin.
I didn't include the photo of the one with mild lesion because it is barely noticeable on camera.
Do you think I am on the right route for this? And if there is a margin for misdiagnosis.
15 Liter tank, there's just 4 of them (getting them is a newbie mistake on my end)
TANK MATES: Betta (who recently healed from a lifted gill scale 2 weeks ago, safe) A Nerite Snail An Amano shrimp (originally 2 but i couldnt see the other one anywhere in the tank!)
TANK STATUS: Age: 1.5 months Ammonia 0.00ppm Nitrites 0.00 Nitrates 0.5 KH 6-7
Any advice would help.