Randy Holmes-Farley
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My Tank Thread
If a water change lead to deaths, there are two possibilities:
1. The new water had copper or another toxin at very high levels. Nothing you normally test for will kill corals after a water change.
2. You stirred up a bunch of nasty stuff and started a bacterial infection on the corals.
1. The new water had copper or another toxin at very high levels. Nothing you normally test for will kill corals after a water change.
2. You stirred up a bunch of nasty stuff and started a bacterial infection on the corals.

