Royal Gramma bought yesterday

[cls8s]

As the title says, I bought a healthy looking royal gramma yesterday with no white spots of any kind on it. I was looking for it in the tank tonight with a flashlight and saw white spots on its head...is it possible for ich to onset that fast? The clown in my tank has no spots at all. Now that I moved the gramma out of his spot, he's nowhere to be found...I guess I made him mad. lol.

It's not even visible in a pic. Am I just being paranoid?

 

[cls8s]

Thanks for the help. My clownfish has it now...must be ich. Not sure what to do, I guess get a small tank to keep them in for a month while I treat them so that the protozoa can die off in the main tank.