I hadn't added aquariam salt (plain) to my cichlid tank until my males started fighting. It seems to have eliminated the post fight infections that had started showing up. As weel most new fish I had gotten before I added salt who get something (ink, bady fugas, ect) within the first week (not fish stores locally, just pet stores with a few tank - sick fish are what you have to expect) now the last few times I have added fish it has gone off without a hitch, no infections!
I don't use nearly what is usually called for on the box.