wedge

Hi, I have a question regarding a HOB skimmer I own. It’s the bubble magus E3 HOB, I finally got it tuned recently but when my gf fed the fish one morning it went crazy out of no where and overflowed out the collection cup after I fed many times and it was not overflowing. Tried to re-tune it...

I was messing with my aquascape and I was just wondering do soft corals, anemones, or any type of coral wedge themselves into the crevices of rocks to hold themselves in place resulting in side pressure causing the rocks to be dislodged or move apart?