How to remove mushrooms growing on my rocks ?

[Casey8]

I have a huge problem battling with blue and red mushrooms spreading on rocks. They have been multiplying too fast and sting my sps corals. I tried to remove some but I couldn't get their feet off from the rock. They attached themselves like glue, the only way I could do it is by tearing their feet/stomach with my fingers and that made my tank water stinky lasting for a few days. I don't want my water contaminated by killing them like that. Is there any method to remove them safely and to save them too ? At least I can give them away to someone who would love to have them.