Neon Tetra - Ill?

[Hayley_W]

hi all
i have one neon tetra which has a large white dot on its nose. it looks like a large spot, should i be concerned? tried researching but cant find anything that looks like what it has.
all the others seem fine at the moment.
thanks

 

[BethK]

Are you able to get a photo? What are your current water states/tests?