All cooking salt contains iodine or just some? Don't they have to lable it as such? Is it the amount of iodine present that determines this?
What kind of problems were you having? It really only treats ick and then does not necessarily treat it but it irritates the fish skin so they produce more slime coat and scratch off the ick. In reality salt and heat are supposed to be used in conjunction! Or its almost useless. The heat speeds up the life cycle of the ick and the salt helps the fish to rid themselves of the spores and hopefully create a thick slime coat.sea salt and kosher salt contain no iodine. When i was having problems with my tank and fish when i first set it up, i was told to put 1 teaspoon of sea salt per gallon in the tank, mixed in with a small amount of tank water. So I spent about 45 minutes stirring the salts until it "dissolved" and was fully suspended in teh water. Then slowly added it to the tank. Didn't do a darn thing (good or bad). since that time I have read quite a bit more about it and understand that it isn't necessary except under certain circumstances (like those described above).