I'm treating Ick right now and have been adding some salt for the last week. I hate it, the quality of my water has changed. It looks foggier and if I look closely I can see suspended particles in the water. None of the fish colors are brighter, if anything they seem a bit duller. The fish also seem more lethargic but that could be due to the high temperature not the salt. I added the last of it yesterday and am just going to continue treating with heat instead.