Over a month ago I lost most of my fish due to not properly quarantine of new fish I bought. Everything died accept two fish a yellow tang that was infected but survived and a six line wrasse that has never shown any sign of infection. Initially I tried several reef safe treatments but nothing worked. Both fish seem fine now but the yellow tang spends alot of time with two cleaner shrimp picking at him every night. I plan on removing the fish from the tank and treating them in a quarantine tank and leaving the reef tank empty for 8-10 weeks. At first I was convinced it was amyloodinium but now I'm not so sure. Um reading the marine aquarium hand book by Martin Moe and it sounds like it could have been cryptocaryon or even brooklynella. How can I be sure of the disease? Should I treat for all?