my florida rics does not open much

How long have they been in the tank? Tank height? Try to shade them a little and/or put them at an angle to give them some time to adjust.
 
Sometimes they never will acclimate if the light is too bright. I had a rock with four blues up high under 4-t5's and they stayed small for over a year. I finally realized they didn't like so much light (from seeing them while diving in the Keys), moved them to the bottom of the tank under a slight overhang and they are beautiful now.
 
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