Majano Starting

[Willow]

i noticed a month or so ago i got a frag with a majano on it. a few weeks later there are 3 of them around. tonite one is stuck to the front glass of the tank. i was kind of amazed how it got there. i placed the magnet about 2 inches below it to see if it would move, hour later its attached to the magnet.

should i be dealing with this now or are they not a big deal? they are kinda cute, but i certainly don't want them covering the rocks everywhere. will the hotwater or kalk work on them?