I bought two separate colonies of zoo's two weeks ago. For the first day, both colonies did great. Then they both closed and have not opened since. As I said, this was a couple of weeks ago, so I'm concerned they will never open. It seems strange to me that both colonies have done this (I have them on separate sides of a 120 gal tank). All water parameters are stable and good and all other fish and coral - including several other zoo's are doing great. Does anyone know why this would have happened and is there something I can do (or should do)? I use power compact lighting and I have the zoo's placed about 12 inches from the top.