Most of my acans are mounted on pieces of live rock. I tend to choose
rock that is flat. I like to use epoxy for building a ramp so that it is easier for the coral to encrust. Try to mount your frags so the flesh is flush with the rock so it can start encrusting easily. I notice that mine really start to grow well after being in my tank for about 4 months. I guess it takes some time for them to get used to thier new lighting and tank conditions. I have had some grow from one polyp to 10 polyps in about 5 months. I have kept mine at various levels in a 40 breeder under T-5's. A few of mine have lost a little color but most have kept their beautiful colors. All
of these are now off the sand bed and mounted on live rock.