Multiplying mushrooms!!

[BCShelly]

Hi everyone, Shelly from BC here. I have had my tank up for a year now... YAY! I've only lost about $300 worth of fish so I think I am doing ok
I have these crazy furry mushrooms that might be taking over my tank. The first one I bought was the size of a toonie and then after about 6 months it split into three. They are all huge now and the mother has just split again (into 2 this time). In the pic attached is the mother and her new baby. I can't get these suckers off the rock, I'd love to give a couple to my neighbor before I have a mushroom with live rock only tank!! Any suggestions? I'm worried the babies are going to start splitting any time now!! Thanks