looking for help with adhesives

[batguano]

I'm having a lot of trouble with small individual mushrooms drifting off my rocks. I have seen some of my crabs (hermits and emerald) push them off the reef. Does anyone have any info. for me on using adhesives to glue the polyp right to the rock? Please be specific with brand names and experiences.

 

[batguano]

Gee thanks for the outpouring of help, don't everyone reach out at once(just kidding)! I think I solved my dilemma anyway. I put some rubble in a critter keeper, put the loose shrooms in there and stuck it in my tank. Hopefully the loose guys will attach to the rubble and then I can use rock adhesive to place the rubble where I want on my reef. We'll see.