You can try an epsom salt bath for 30 minutes and see if that helps. You will need pure epsom salt (magnesium sulfate) with no other ingredients. Take a gallon or 2 of tank water, and place in a container with an airstone. Mix 1/4 teaspoon of epsom salt per gallon, and place the fish in there for about 30 minutes or once they start to act real uncomfortable, which ever comes first.