Water changes

[marie]

yes i agree that a large change can solve quite a few problems, but most times, the aquarist doesnt know what the problem is (which is my point), and there are inherrent risks in a large change itself. i suppose it's a balance thing. does the risk outweight the benefit, or vice versa? i dont think we can generalize that.

But what are the inherent risks exactly and are corals stressed by a large water change (other then being out of the water for awhile which happens in the ocean at low tide all the time anyway).
If you are using the same salt that you always use and the salinity and temp are matched you should be good to go.

This is what I'm curious about, has anyone done a large water change, stressed their corals to the point of dying and can definitely say it was the water change that did it?