Columnaris (Flexibacter columnaris)
Synonyms:
Cotton-wool, Mouth Fungus, Flexibacter
Symptoms:
White mouth with tiny filaments, white areas near edge of scales, clamped fins, fins start to rot in the later stage, fish struggles and sways near the surface
Causes:
This is bacterial infection which is very common in the aquaria and is very contagious. Immediate action is needed to contain it before it spreads to other fish.
Treatment:
Broad spectrum antibiotics, Sera Baktopur, Binox, Maracyn I & II, Kanacyn, Terramycin, Acriflavine, Furan, Copper Sulfate
Flexibacter columnaris thrives very well in warm waters therefore it is necessary to gradually lower the temperature to prevent it from progressing.