green umbrella mushroom help

[blue steel]

well I just got my umbrellas in and I have no Idea what they eat, how to feed them, and I place them on one of my rocks and after a while I find that they have fallen to the sand. Should I just leave in on the sand or do they need to be on a rock to multiply?
:help:

 

[technik]

They need to attach to a rock. Get a clear plastic cup and put a piece of rock into it. Set the mushroom on top of the rock and it should attach in 1-2 weeks. After that just place it anywhere in the tank.