One of my acan frags I got 4-5 months ago has grown plenty of heads and is on a bigger rock (I drilled a hole for the frag plug). I saw it today and for the first time in a very long time I could see a lot of the frag plug, there was a pep shrimp picking at it...I even saw the skeleton on the biggest head...my other corals seem ok (1 other acan in the tank) There are 4 pep shrimps in the tank and they are good sized (2.5 inches or so)...anyone have similar experiences? thanks...