gourami and pimple-like bumps

If the tank is established the ammonia reading is probably caused by chloramine. As long as you use water conditioner it should be fine.

Questions -

The fish appears to be bloated in the pictures. Is this the case?

Reach into the tank and touch the blisters. Do they pop?

If you can get a better picture of the fish. The ones you've posted are too hard to distinguish.

I wrote you like a three paragraph response and i guess i did not send it >.< and now it does not exist.
I will sum it up though. I recently dealt with a fish disease. Since I am right now studying microbiology i had an advantage when it comes to parasites, since i have much reference materials about them. I treated this fish (he had ich) by raising the salinity to the highest he could take, and upping the temperature to the high end. Parasites and bacteria are very sensitive to changes in salinty, temperature, pH, oxygen levels etc. Therefore IMO i believe you should try moving him to a hospital tank (can be a large tupperware container or something of the sort) and increase two variables to the max he can take. I did this with a very young molly so they are pretty durable. I do not know much about gouramis. I think this kind of treatment is much better than chemicals since such chemicals can permanently affect your aquarium ie Copper sulfate = death to inverts.
Also, if you find the name of the beasty attacking your fish then let me know, I will see if I can dig up some information on it for you.

THE V said:

If the tank is established the ammonia reading is probably caused by chloramine. As long as you use water conditioner it should be fine.

Questions -

The fish appears to be bloated in the pictures. Is this the case?

Reach into the tank and touch the blisters. Do they pop?

If you can get a better picture of the fish. The ones you've posted are too hard to distinguish.

Click to expand...

Agreed. Fish seems to be bloated and so called pimples does not resemble Ich infestations, at least from pics.
I am to believe that this maybe somewhat related bloat issue.
Presence of/Prolonged exposure to 1 PPM of NH3 at pH above 7.4 can be detrimental. You should control NH3 first before tempting meds/heat treatment.

Since this does not look like Ich, I would hold off on raising temp which can pose further stress on fish already in distress.

Good Luck!

THE V said:

If the tank is established the ammonia reading is probably caused by chloramine. As long as you use water conditioner it should be fine.

Click to expand...

If your water has chloramine as well as chlorine, make sure that you're using a water conditioner that locks ammonia and doesn't just dechlorinate. Prime or a similar one (amquel, etc) does this and I recommend doing it since that Ammonia is still in your aquarium. I used the API dechlorinator once since it was inexpensive and rapidly found out that I had chloramine in my water when my ammonia levels spiked out after a water change.

I would guess that the pimples are a secondary infection to the bloat. That means treat the bloat and everything goes away. The immune system is just to overwhelmed to deal with an infection of normal types right now.

Bloat is either organ failure or bacterial infection. It used to be hard to treat, but now there are products that treat it out there. Hopefully its not organ failure, but with a secondary infection like that its most likely bacterial.