Just noticed this on our one spot foxface this morning (it may have been present yesterday but I didn't notice when I was feeding as the lights were already dimming). He's got similar spots on the other side as well. The half black mimic tang has a few (smaller) dots that may be the same thing on its tail (couldn't get a clear image; will try to post one later). The best way to describe how they look is teeny tiny air bubbles. These are the only two fish out of forty some odd fish that seem to be affected (and none of the other three tangs). They're not flashing or otherwise behaving abnormally, and still have a healthy appetite. 99.99% sure it's not velvet (been there, done that - and this doesn't look anything like it).
Nothing has been added to the tank since early July (so 2+ months with no new fish). I started a Polyp Lab Medic treatment (triple dose), but being in Canada I don't really have too many options for medications unfortunately.
Any help/insight would be greatly appreciated. Thanks in-advance.
#fishmedic
@vetteguy53081
Addendum: Spoke too soon - the powder brown tang has a 2-3 spots (total, both sides) as well. About the same as the mimic. The sailfin and whitetail bristletooth are 100% unaffected (for now anyway).

Nothing has been added to the tank since early July (so 2+ months with no new fish). I started a Polyp Lab Medic treatment (triple dose), but being in Canada I don't really have too many options for medications unfortunately.
Any help/insight would be greatly appreciated. Thanks in-advance.
#fishmedic
@vetteguy53081
Addendum: Spoke too soon - the powder brown tang has a 2-3 spots (total, both sides) as well. About the same as the mimic. The sailfin and whitetail bristletooth are 100% unaffected (for now anyway).

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