Sick Dwarf Gourami?

Wow, thats alot of Dwarf Gouramis in your tank? Any aggression? I'm no expert but it looks like ulcers from bacterial infection. This is usually caused by poor water quality. Gouramis are very sensitive. Have you tested your water lately? How often do you do water changes? This info would be very helpful.

Are you using a under the gravel filter system? I have a friend who has the same problem with his Gourami (the spots in your pic). We couldn't figure it out, has perfect water conditions and he does regular water changes. The only thing I can make sense out of it is the filtration system is fouling them up?

There is a thread in Gen Freshwater about another sick gourami....the consensus, I believe, is that Gouramis, especially Dwarf Gouramis, have been "messed with" so much by selective breeding, adding stuff to their water and bodies to make them flashier looking, that its seriously weakend the species. Or at least, the ones regularly available. They are now very prone to all sorts of parasites and diseases. Its so sad, this happens every time a breed or any species becomes popular. Backyard breeders abound, trying to make a few dollars, and the animals are the ones who suffer. I have been wanting to add a D. Gourami to my larger tank for ahwile ,but now Im not so sure. They sure are beautiful fish though!
I dont have much advice for you though, sorry. Just keep his water nice and clean by doing water changes every day or other day. Have you medicated him with anything?

Well, that would explain why my friends Gouramis died and all the other fish are virtually not effected. They seem to get to a certain size then they start to have problems or what?

I bought 3 D. Gouramis a few months ago, and all of them have died. They were very calm fish, and very pretty -- too bad about the over-breeding, etc.

In my friend case the one Gouromis that looked healthy died first then the other is still alive though. Still all of his other fish are un-effected. How are your little guys doing?