Its about an inch, it has some nice colors on it also. i cant find it anymore and Rcpilot say i should turn up the heat to about 105 to kill my aptasia on my liverock.
i would let them sit in freshwater, take like 20 lbs or so and keep them in saltwater and do some type of aipstasia control on those rocks and when its all dead and gone use that 20 lbs to seed the rest of your rock..
rasing your temp that high will kill everything so why pay 5-10 dollars a pound for rock just to kill everything on it. just get some pepermint shrimp and some aptasia x