I know many people warn about using sharp rocks with fronts. i have a 150 with 7 fronts, 3 C. moorii and a few other tangs. all my fish are 2-3 inches. I used to use have a large pile of about 40 large lava rocks and never had a problem. i read on here that using sharp rocks can hurt my fronts. i took all of my lava rocks out about 3 monthes ago and i noticed my fronts don't seem as happy. before they used to explore and be more active but not they don't do much. my question is, i know that they CAN hurt themselves but what are the chances they WILL? i CAN be cruched by a falling airplane but the odds are i won't.
This is a picture of my 75 but i did the same thing in my 150 before i removed the rocks.

This is a picture of my 75 but i did the same thing in my 150 before i removed the rocks.
