Are your fish rubbing against rocks? If not I wouldn't worry. I have a royal gramma that was flashing 2 weeks ago, white spots last week, and the next day my clown had several white spots on him. I soaked the food in garlic, they ate it up.
I've seen a little flashing and I know that garlic doesn't cure ich, but it sure as heck doesn't hurt. I used minced garlic from the grocery store, or you can use garlic extreme from your LFS
As for the poster above me. If you're going to comment at least add something to the conversation.
I used garlic last week and my fish are healthy and eating today. Again, I still have ich but the garlic may help the fish fight it.