Hello, I am new here and in advance thank you all for your help. I currently have a 90 gallon that with these inhabitants. All fish have been in the tank 3+ months. 1). Powder Brown Tang (3-4 inches) 2.) 2 True Perc tank raised clowns 3.) 1 Six line Wrasse 4.) 3 Carberryi Anthias 5.) GSP, Misc Mushrooms, and some button polyps. 6.) 4 inch Maxima Clam 7.) 2 Cleaner shrimp, misc astrea, nassarius, and hermits. My problem is this; the tang has recently gotten ich. He is still eating but, is flashing and pretty well covered in white spots. All other fish are fine, and show no signs of ich, even with the tang having it 5+ days. I currently have a 12 gallon nano that is cycled, but void of livestock, and a 10 gallon hospital tank. I am wondering what the best course of action from here out. I can treat the tang individually, but am afraid that when I put in back in the tank, he will catch it again. Or, remove all fish and treat the tang, however I don't feel like the 12 gallon I have will be adequate for all the fish to survive the 4 weeks I would need to leave the tank fallow. I basically have no money to purchase a larger tank even used, as I am just a poor college fellow Any advice on what to do? Or a cheap method to export all the fish and keep them alive? Thanks so much!