Im very bad when it comes to disease, always avoid it so dont know much how to treat, but at the hatchery I use to work when the tech forgot to bleach the sea water we got a lot of amyloodinium and cryptocaryon, they treated safely (even dottyback larvae) by reducing the salinity over the course of 10 hours as low as 1.010 and dosed with this:
http://www.marinedepot.com/Aquarium_...MEPSEX-vi.html
always keep the SG low with babies from 1.016 to 1.010-12
hope this helps
Edgar
http://addy-zone.com