What is is on my kole tang?

[revenant]

It’s been a heck of a week and I’m not happy to be posting in this forum and so soon after I got my tank going.. I noticed a white spot on my kole tangs dorsal fin today.. what do you think this is? Ick or lympho or maybe someone nipped him? FYI - the other spotty looking stuff is debris in the water... the tang looks 100% perfect aside from that thing on his fin..

Edit: is it possible to edit a thread title?

 

[Reefer40b]

Lymphocyte probably should go away on its own with good water quality.

 

[revenant]

Is that what it looks like? I thought so too but wanted input. Thanks! My water is good... been keeping a log daily testing all major parameters... my salinity might be off a little will get to the bottom of that soon and will slowly raise it (I suspect it’s low) with evaporation. EDIT: Salinity is off 1.021... but going to raise that slowly to 1.025

 

[Qasimja]

hows the fish today

 

[revenant]

hows the fish today

100% normal.. very active and grazing ... no more spots have appeared.