Contrast the SPS growth with my Orange Pavona
Top picture Feb 2013, Bottom picture April 2013
You can see the top part (white) where the putty holds the frag is completely encrusted to the rockwork - about a 1/3 inch growth . Hopefully I can see some growth onto the rockwork. On the right side near the top you can also see the encrusting over a small section of the rockwork.
pavona growth by [url=http://www.flickr.com/people/93072545@N02/]