Help I.D'ing what could be wrong with my Gold Bar Maroon Clown?

[PhoenixOne]

I've had my clownfish for 6 years. 2 days ago these marks appeared on it. It's eating normally. Any idea what this white powdery marks on him are?
SG 1.025
PH 8.2
KH 8.0
CA 400
Nitrate 0
MG 1200
water changes every 3 weeks to a month
90 gallon AGA
proflex model 3 sump w/Cheato
salt- dd h2ocean
temp-79.1
lights-acan A104AC 48

 

[Bry17nyc]

On his head?

 

[PhoenixOne]

On his head?

Yeah. It's head and dorsal fin.

 

[PhoenixOne]

It's been 5 days and it hasn't gone away. Anyone help would be greatly appreciated. Thanks.

 

[michaelchen]

Did he lose appetite as well?
My Crown had the white powdery on his body few months ago, and he lost appetite for 4 days.
It was not until I introduced Garlic Power into the food to restore his health and appetite.

Try that.

 

[PhoenixOne]

He's eating as he usually does, like a pig.

 

[PhoenixOne]

Well. I had to try and do something to help it out. My best guess, it looks like some kind of fungus that's making him slime. I brought a new bottle of Melafix (one I had was expired) and started dosing the tank. I've used it when I first started reefing when some of my fish came down with popeye, fin rot and a few things over a couple of years and it did the job. I hope in a few days, it will be gone.

 

[PhoenixOne]

7 days after dosing Melafix, it seems my Maroon Gold Bar Clown is all fixed up. Did 25% water change and completed a much needed intense clean up of the sump and equipment. I hope it doesn't comeback.