I usually buy reef water from the fish shop but I finally broke down and got an API tap water filter and a bucket of Red Sea Coral Pro salt. I just did the water change and immediately my frogspawn coral pulled completely in and released its tenticles. Is this cool? I think this coral is going to come up stairs and kill me in my sleep! All the rest of the fish and inverts seem fine. Would this seriously be caused by the different salt? Is this normal? I dont like to be killed by corals at night.
I am a bit worried about the rest of them!