I also hope that your attempt goes better than mine. What Ive learned about marine ich is- Fish will become resistant(not immune) to it over time, a UV sterilizer is very helpful, in tank treatments are a waste of time imo(not potent enough to kill ich), a healthy and well fed fish ought to battle it fine and cleaners (Like shrimp and wrasses) only kill the parasites they can get to. Best of luck!