Live rock destruction???

[Mike Ha]

Hi everyone, Im just new to the hobby. I got live rock from LSF. I been raised them with tap water to scrub off those green hair aglae. I just wonder is there any possibility something eating my live rock or cause damage to live rock. It seem get more and more holes over time?

 

[BertieBones]

The same thing has been happening to my rock over the last 9 months