good link jhon k jimmy c if u have it use it if u can return it and get ur money back one way or another i would now and days they will piss in a cup try it on one fish the fishwill heal by itself and vualah ich treatment that was tested on one fish ,one coral and its a reef safe remedy for krypt/ich /velvet note to all who dont know if there is ever nething that will indeed help youre aquarium with ich or ne thing else it will be on the news and the front of all the stores the fish keeping industry knows how much we spend on a our fish so they keep making stuff up to have us waste money theres three proven ways to heal youre fish of ich 1 hypo salinity .2 copper witch in some cases kills ur livestock.and 3 the fish doing it by itself ne thing else is langueage removed quite frankly best of luck to you and youre aquarium