Polyps receed during daytime?

[riggs]

Thanks Codfather. comforting to know that others have similar settings to mine - 250's & depth of tank....

However, brings me back to "why" the polyps retract?

Sorry - Type-o in original note Calcium is actually 430. I've also been doing quite a few water changes lately & use Canadian springs bottled water (I couldn't find a good supplier for Perrier ;-)

What about the amount of time Corals take to adjust to their new environment?? Different for each one?