Not too long ago i got a duncan and it was opened for a few days then stayed closed for about a month now. I have another post about it and another coral not looking good. I thought it was dead but i kept it in there cuz i could see the inside glow with tissue under the blue actinics. I have moved it around trying to find somewhere it likes and started to notice that now it will come out just to where the top of the skeleton is and then retracts back into it. It will do this all day and wont come out and show its beauty. What could be the problem? I just moved everything into a new tank this weekend, started using kent's reef salt instead of the instant ocean, same sand and rocks, 25 gallons of new water and 25 old water and it is still doing it. Any ideas of what it could be? Ever since changing to the reef salt all my other coral looks great and it thriving but this one. Parameters are nitrite and nitrite at 0, ph at 8.2, calcium at about 450, not sure on alk and mag because i need to get a kit for those but with the amount of kents i made for the new setup they should be where they need to be and like i said everything else looks great. My hammer has come out farther than it ever has, palys look awesome, hollywood stunner chalicw has gotten its color back, green flower pot looks great and streaching out far, candy cane is plump, and zenia are waving. Not sure why it peaks out and goes back. Here are some pics of the corals.