I've just recently noticed some of my fish (regal, sailfin, kole tangs) have white spots. I have a 150g reef tank with lots of live rock, so catching each fish is next to impossible and a copper treatment is out due to inverts/corals. My question is if the fish are eating, swimming, behaving properly and the only thing wrong is the white spots should I be trying an ich treatment? Obviously if they were acting strange, not eating, rapidly breathing I would have to try some treatment, but if they seem otherwise healthy do you attempt a treatment? I have been supplementing their nori with selcon and garlic guard, and am thinking of getting some more cleaner shrimp (I have 2 Scarlet Skunk Cleaner Shrimp and am thinking about getting 2 Blood Red Fire Shrimp or 2 more of what I already have). Any thoughts as to which kind of shrimp is better? Should I be trying a cleaner wrasse? Please help, I am new to this hobby (6 months) so any advice is greatly appreciated! I've read tons of info on line and my head is still spinning with all the different "treatments", any advice you can give based on experience would be awesome! Thanks for your help! Also can Ich come into your tank on corals?