I have a 55 gal sw tank that has been fully cycled with 0 ammonia, nitrate, nitrite good ph, salinity for several months. Some of my fish have developed white spots like salt and it looks exactly like the ich my brackish water mollies and goby got. I have successfully treated them as well as hopefully prevented it from spreading to any of my other 4 freshwater tanks. Could I have passed the ich from the brackish water tank to the saltwater and if so how do I treat it. I do not have a reef tank. No corals. But I do have about 25 lbs of live rock and have some great cleaner shrimp. I got rid of the ich in the brackish water by simply raising the temp to 90 (I read about this on the net) and the fish seem to be tolerating it fine. I chose not to go with chemichals due to my violet goby. I think he is a scaleless fish(?) and most treatments said they were not ok for them. I do have a med that is copper based and another one that is malachite green. Please help because my royal gramma has dissapeared and I'm hoping it didn't die and my tiny blue tang is looking bad also. If it matters I also have a choc chip star. Thanks