Concerns about our skunk shrimp

This actually doesn't directly pertain to its health, but here we go. Our skunk shrimp insists on cleaning EVERYTHING. Fish, your hand, anything, including my Koralia powerheads. I'm worried about him injuring himself on one of the powerheads. If he were to loose a limb to one, would it just grow back with little harm, like a lot of other inverts?

 

Mine do it all the time. Actually, my fireshrimp is too laid back for that kind of thing, but the skunks are everywhere. So far I haven't seen them hurt themselves or get sucked into the PH's when they decide to venture up there to clean them. I remember once I came home and saw the molt sucked up to the side of the koralia, scary moment. As for the limbs growing back, I don't know. One of my skunks ripped out an antenna while molting and it grew back on the next molt.