live rock yes i do about 100plus pounds it started to grow a long time ago then stopped when i run the calcium at around 500 i see things turning purple but seems like it stress my aninomies seeded the tank before the little chips i put in there just faded tank has been up for about 6 yrs no corraline got some of that slow growing cherry red on some spots like overflows thats it no colars on the rock ; lighting oddessy light 3 -250 hqi 2 140 watt blue actinics about to switch that to 4 96watt actinics