What about increased stress from netting, being moved, put in a smaller tank, and having the water params rapidly changed? If the fish are already sick, this can't help much.

Ps, not in any way trying to discredit hypo, just some things I've been wondering about

Some would argue that you could also lose a handful of fish from your QT'ing procedure. The various QT'ing procedures can be quite taxing on fish.

Honestly, I don't think there is a right or wrong answer to this one. There are tonnes of people on both sides of this fence. If you feel QT'ing will help go for it. If you don't believe it will, don't do it. Fish have died on both sides of this fence.

Definitely a valid argument.

This is my first time doing hypo, ill let you know how I get on. I also bought a nice big qt tank so hopefully my fish will be happy in there

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One thing that I have noticed since removing my fish from the DT is that the pod population has exploded. There are so many in there now I could support a shoal of mandarins! The wrasee will certainly enjoy it when he goes in.

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seems that hypo can have more benefits to new fish than just treating ich. found this today. interesting read.

http://www.advancedaquarist.com/2007/6/fish

I have also read about the theory of the ick exhausting itself after a number of generation, but I am not sure it's true. I know people who did got ick in the tank, then they thought it went away because they have not seen it for 2 years, then they get a new tank, tansfer the fish and bang, ick exploded.

Means that it was still there, just to a lever that fish could control to a degree. Once stressed out it came back with a vengance.