I'm looking for some advice on managing ich in my tank. All my fish have been happy and healthy for about the past 9mo. About a week ago I had a heater mishap and my tank temp dropped to about 72 over night. I caught it right away in the morning and slowly raised the temp back up. Since then I've I have notice a few ich spots on my fish, nothing crazy but a few spots here and there. I know that stress events like this can cause and outbreak. Obviously ich has been in my tank this whole time and the fish must of just been able to resist it, can they they recover from it and again become resistant? I have been trying to feed more often and add selcon to their diet to help pump up their immune systems. My current fish are 2 saddle back clowns both showing minor spots, a yellow tank and a tomini tang also both only showing a few spots, blue jaw trigger just started showing a spot or two, a 6 line wrasse, starry blenny, target mandarin all showing no signs of ich. Let me know what you all think, I currently don't have anything set up for QT to treat all the fish, but want to be prepared if things get a lot worse. Could I use something like a large Rubbermaid stock tank to treat them in if need be? Maybe with a air stone and sponge filter? I do have a Hanna copper colometer and copper power on hand. TIA