Freshwater dip = 0 success
reef-safe medication = 0 success
Copper and hypo works for me.
Treatment for ich has to start as early as possible once the sympton on ich shows. The earlier you start the better the chances for your fishes.
The ich parasite is also another type of inverts so if those reef safe medication that claims to be able to kill the parasites but safe for the rest? Do you believe it?