I've been asking some questions regarding Prazi myself, on the KHA board.
Because of it being pricey, it's probably a good idea to scrape your fish
to see if they even need such a treatment. One of the nice things about
Prazi is that it won't hurt your filter and one treatment is all that is
needed as it stays active, as long as you don't dilute it with a water
change. One person with experience said he saw a lot of flashing after
treatment, so be prepared for that.

Who was the one that put it in the blender? What happened?

Regarding Koi-zyme, true it is not a cure, but seems to help a fish with
small ulcer starts, ime.


~ jan (Do you know where your water quality is?)