well the acans in my tank are finally really starting to grow some heads. one of them is starting to outgrow the frag plug. what is the best surface to put the acans on? i just want them to be able to spread out and look good like the large colonies i see at the lfs. i was wondering if i just got 5 or 6 flat rocks or maybe even quohog shells if that would work. its so cool to finally see some things grow in the tank. one of them has like 6 or 7 heads on it growing. these are the guys i bought at brass so i'm pretty excited.