I disagree. Ich is in your tank 24/7 – you can not eradicate it, only treat it. Ich is an external parasite that attaches itself to the body of a susceptible fish – the real question is why is the fish susceptible to the parasite? The answer to this question is what needs to be corrected.
Now, Hypo – sure it will work, I don’t doubt it in the least. So pull the fish drop it in your hospital tank and treat it. But at some point you should realize that the fish is being put back into the main tank where it got Ich in the first place. When a fish gets stressed it becomes susceptible to ich – what you want to do is find the cause of his stress and fix it. Personally I think Hypo is adding stress to the little guy – but its your fish.
Most often its water quality, or swings in it. Last time I had Ich it turned out to be stay voltage – dropped in a ground, stress gone and ich ran its course and went away. Ich can not kill a fish, stress kills the fish – a stressed fish becomes susceptible to a bacterial infection that can kill it. Go with hypo if you must, but find the cause and fix it too. BTW, don’t you have a cleaner shrimp? Drop in a couple more and the ich will be off the fish in 24 hours.