<a href=showthread.php?s=&postid=12691656#post12691656 target=_blank>Originally posted</a> by adova
Actually, his corals are pretty hardy on their own - the fish, if already stressed from shippment, disease, etc, could be affected more by small problems in water quality.
Also, the tap water has a LOT of trace elements that the RO/DI takes care of. These trace elements can have a more profound affect on the biology of the fish than the corals - just removing the chlorine is not enough IMO.
Shawn