Just got hit by a velvet attack. By the time I diagnosed it (after describing the sugar coating on my fish to my LFS
for 3 weeks), it was too late. Lost about 8 fish. I used a product called Revive. Added it to the water, with coral, shrimp snails, and all. Turned of the skimmer for 2 days. It says after 3-4 days, do a 50% water change. Did that and treat again the same way.
Couldn't get all (the 4 left) fish out so I'm hoping I got thru it. Thur all that, the yellow tang, 2 blue/green chromis, & a watchman goby have survived with no signs so far.
I understand the most effective way to deal with it is to remove all hosts - all fish for 5 wks or so, turn the heat up a a bit and the let the velvet find no hosts and die off. I may have to resort to that anyway. If you don't mind, keep me posted on your progress so maybe I can more effectively monitor mine.