I've had a seriatopora frag for a few months. I only recently started dosing calcium though (yeah, I know) and it's looking better. It got a lot more polyps but I noticed they were longer on the side facing the light. I rotated the rock it was on and got the same result after a few days. I tried moving it more toward the center and higher in the tank but now none of the polyps are really fully extended. There aren't that many choices for placement in my tank since I originally set it up for zoas alone. I'm attaching some pictures. What do you think?