Too long; didn't read: I lost both a peppermint shrimp and a fire shrimp after using hydrogen peroxide spot treatment to get rid of a bad dinoflagellate outbreak in separate incidents. Both died during the night after treatment. Others have reported similar incidents. Don't use hydrogen peroxide...
Wanted to share my experience with the effectiveness of H2O2 baths
This whitetail tang had an advanced case of velvet, and after a few days in the QT was on deaths door :(
I ended up treating him with a 30m Hydrogen Peroxide bath (following @Humblefish instructions) followed by a standard...