Green digi

for those with more experience on sps I need some input, I added this green digitata on Saturday, is 16" from the light LED unit, and as you can see all polyps and green coloration are nice at the tips, but from the tips to the base are brown and not to much polyp extension. Are they reseeding or they are still acclimating .water is all good Ca 440 and alk at 9, I'm currently using phosphate remover.
Thanks

6046c (1 of 1) by alan marquez, on Flickr
6047c (1 of 1) by alan marquez, on Flickr