SPS polyp extension question

[sweet ride]

Is it possible for SPS to never have polyp extension but continue to encrust. When I say never I mean not during the day, not during feeding time and not even in evening oh and not even a tiny little bit. The coral continue to maintain its color, encrust and grow.

Side note at one point in time it did have nice polyp extension.

Here is the link to my system.
http://www.reefcentral.com/forums/showthread.php?t=1881861

 

[saltyliving]

i have had poor PE for a while but still continue to have growth. I have a couple wild acros that i have never seen PE but the grow. from what i understand the wont grow as fast because they are not as happy and unable to grab food.

 

[Hookup]

Theories on PE include flow control... Extended to slow the flow, retracted to increase it... Helps with import and export of nutrient within the coral... But with this theory, extension is used to manage the process/flow ...

 

[chessmanmark]

When is the last time you changed your carbon?