Help: Sterbai Corys With Lump On Noses

[sneakypuss_01]

Hi All

This is my first post here, as two of my Sterbai corys are sick.

Yesterday I discovered that two of my five Sterbai Corydoras had lost their barbells and both have a white lump on the tip of their nose. The lump appears to be solid.

I have removed them from the community tank and put them into my 25L holding tank. As per the LFS (here in Australia) I have begun treatment with Tri-Sulfa tablets. I've also added an airstone to the tank, in case they need they extra oxygen.

The other corys and community fish appear to be fine.

Here are some pics:




Prior to the corys getting sick, my community tank details are:

1. Water parameters
TEmp: 28C
PH: 6.8
GH & KH: Unknown
Ammonia: 0
Nitrites: 0
Nitrates: 5

2. Tank set up
Size: L 36' (92cm) X W 14' (36cm) x D 19' (50cm)
Substrate: As seen in above pic, small round smooth gravel
Filtration: Aquaclear 50 (HOB)
Furnishings: 2 logs (aquarium decoration bought at LFS), 2 slate rocks, a terracotta pot, a terracotta plate, 1 large piece of driftwood, 3 Amazon sword plants
Tankmates: 2 Bolivian Rams, 1 SAE, 6 Dwarf Neon Rainbows, 6 Neon Tetras, 9 Ember Tetras
Tank has been established for 11 months.

Does anyone know what this is, and have I begun the right treatment?

Thank you in advance for any advice on this matter.

Regards
Sneaky P

 

[WILDER]

yes the right med as it bacterial.
Sounds bacterial.

Any redness to the lumps.