I added some green branching sps to my tank and watched as all the polyps retracted and the surface got jagged and bumpy (the rear coral on the picture). The tips got white and looks like it's splitting. It's also encrusting at the base and has good color, just a more neon green and I can barely polyp movement. I added a second piece from a the same source. As seen in the picture (the coral in front) the polys were all extend and a darker green when I put it in. It looks like the polyps are retracting and I'm fairly certain that it will get more neon green and bumpy like my other piece. All my parameters are in check: 8.5 dkh 410 ca 1350 mg 8.2 ph 79 degrees water temp Zero nitrates and phosphates. I have two mp10's in my 55gal display 2 Hydra 26HD LEDs 10" over the tank. The coral is about 8-10" deep Good coralline algae growth on back of tank I add essential minerals and do regular WCs live stock: Potters angle Coral Beauty angel 6 line wrasse Cleaner shrimp 2 clowns 2 damsels 2 cardinals 2 rbta's My concerns are: - fish nipping? - not enough food/water too clean? - too much or too little light? No par meter to test... :/ - too much or too little flow? Does anyone have any advice or had a similar issue? Is the coral just adapting to live in my tank and probably healthy or am I missing something and should try making an adjustment?