Marine Velvet, I can't believe its happening to me.

[Aquattro]

Mike, when I got hit, all the fish except 1 goby got it. I was able to catch them all and start treatment, but not in time and lost most. I saved a pair of clowns, a yellow tang, a damsel and hmm, that's it. Some fish didn't show signs the same day, but within 3 days, all fish (except the goby) had signs.

If you have a UV, there's certainly no harm throwing it on, but I don't think it's going to help at this point.