Looks like the frag took a turn last night into this evening with some RTN. Only changes lately are the new T5 lighting I added Friday. Possible it was sensitive to the increased PAR. No signs of stress in the 15 other sps frags. There is still a bit of tissue at the tips but it looks very thin. The tort I put in the tank at the same time from your system. is growing very well. Fingers crossed it pulls through.