Water changes

[Quagmire]

Originally Posted by Rippin

One other thing to add to the mix - if you change in the range of +40%, then many of your corals that are near the top are out of water. For a short time, this does not pose a problem, but if you're slow to refill would this cause added stress? Especially if the water change was initiated by a problem? I would think that with such large water changes the MH lights are turned off so that it doesn't cook the corals at the top.

My corals are out of the water for about 10 minutes or so when I change water,no problem.But as Marie said,if its going to be a while,its better to turn them off,just to be safe.