Ok,
So I've been (rightly or wrongly) treating Splodge for parasite for the last 9 days using Sterazin. Below is the original picture of the spot.
The spot has now more or less gone away, leaving a small, white dot - just under the scales which were being pushed out by the spot.
Do I need to do any other treatments? Bacterial or fungus when the Sterazin course is complete? I have one more day of sterazin, then 48 hours wait, then a 40% water change to do (Boxing day)... Any ideas? He's fine in himself, and showed no sign of distress throughout the whole episode.
It's good to see him back to his normal self, but I want to make sure he's completely cured before I move him into the community tank (he's shown the true importance of quarantining fish).