SPS Frags have varied in Health. I've had a good streak (strangely when the Tank Was Young). Those Early Frags seems to have acclimated to the tank and doing the best. My biggest challenge has been adding new Frags, and I think that's all due to improper acclimation (I think Lighting), since my Tank Lighting is now Hybird (T5/LED). T5 ONLY was very forgiving, while after adding LED a bit less. I may go back to T5only, but giving the LEDS a chance since the Older Frags colored up more intensely with LED (when I did the Slow Lighting Ramp up to acclimate the tank). So from now on New Frags will go lower in the Tank for at least 6 weeks. Then bring them up slowly. All before I place on rocks in permanent locations. (It was always so tempting to me to just Mount them up since Tank looked better right away....but didn't look better for the Long Run and they faded out over time).