act now,don't hesitate
The best way to cure ich is to observe new fish closely[perferabley in a quarantiene[wrong spelling o well]and at the first signs of itching,scratching,or the dreaded white spots,remove and place in fresh water,of same temp,and a little tank water[very little]will get the ph to the same as tank.Watch closely,depending on fish it will first lie on the bottom for few minutes and than slowly begin to swim around.The only fish i,ve ever lost to this method would be a hippo tang.Try to leave as long as possible ,half hour minimum,and be sure not to put the water back into tank.I drain water through a net and leave fish completly out of water in cup ,than jently slide it back into water.This will also remove marine lice,flukes,and a few other simmiular looking creatures.If you wait till tommorrow than you waited too long and your problems are just begining.Soooooo get off that puter and dip that fish now.