White growth on head

[fronny]

My large male discus has a white growth on his head it looks like a big pimple. What is it and what should i do about it?
Thanks Troy

[marg]

Perhaps you could post a photo - then the more learned members of the Forum can assist you.,

Regards,

Marg.

[Bill T.]

What are your water readings & are you up to date with water changes? Also, do you have a U.V. sterliser?