We have 2 dwarf gouramis in an Eclipse 12-gal tank with about 6 other small tetras, etc & plants, 2 snails and 1 very small crab. Last nite I noticed one gourami did not attempt to try to eat and this morning he was just laying on the bottom of the tank, I thought he had died. But when I started to get him out, he began to move around some. He had a good-size white circular area on top of his head. Don't think it's ich as it's just one large spot. Could one of the other fish have attacked him? We've only had him for a week, but he seemed to get along well with the other gourami. Actually they were usually together and neither showed any agression. I've put him in a separate area with a little warmer water and added some aquarium salt hoping to help the wound heal. Any ideas? We really don't want to lose him, so please help. We're still learning.