normal growth?

[jeffro420]

i have had this plate for almost 5 months is this normal growth? slow? average? how can i speed up growth. coral is under 2 400watt halides and parameters are in check.

first got it.
<a href="http://s1104.photobucket.com/albums/h329/Jeffro4200/?action=view&current=2011-11-06_13-54-56_293.jpg" target="_blank"><img src="http://i1104.photobucket.com/albums/h329/Jeffro4200/2011-11-06_13-54-56_293.jpg" border="0" alt="Uploaded from the Photobucket Android App"></a>

then today
<a href="http://s1104.photobucket.com/albums/h329/Jeffro4200/?action=view&current=2012-03-12_21-38-01_203.jpg" target="_blank"><img src="http://i1104.photobucket.com/albums/h329/Jeffro4200/2012-03-12_21-38-01_203.jpg" border="0" alt="Uploaded from the Photobucket Android App"></a>

 

[jeffro420]

forgot to say, coral is still just as red, first pic is from camera and second pic is from phone.