Today i noticed white spots on my Atlantic blue. They dont appear to be ick. it looks like his skin is bleaching. He is not acting strange. i dont think it is irritating. Nothing has been introduced to the tank in over a year. tank mates include 2 cardinal fish, snails, 1 hermet crab. I did change seaweed brands two weeks ago. from Juliani Sprungs to off brand orchids. this is sold as sushi nori at the supermarket. Im going to discontinue use immediately and switch back to Julians. I would like to know if anyone knows what the spots are and if there is any treatment?