in my main tank i had 3 dwarf gouranis die in about 2 weeks and dont no why. i have a gourami in my gupppy tank will he go down with this disease if i put him in my main tank.
I'm no expert bu t in the last two weeks there were a few threads about "ulcers" or red spots on gourami. If you do a search you may find some very good information.
if i'm not sure about desease then i use a general treatment and up the temp slightly as a percaution. it's like checken soup it can't hurt but it dosent always work.