Got ich in DT and removed a crab, some snails, hermits and an urchin to a 10 gallon tank. I have read that although inverts dont get ich it can be on their shells. Question is, how long do I have to leave these guys in their 10 gallon before I can move them back into a DT? Do I need to leave them there for the 72 day fallow time to be sure I dont transfer ich to another tank?