Mushroom corals' won't grow!

[fishtails]

I've had my green mushroom corals' for a month now and it hasn't split yet! It is a little bigger than a 50cent piece when fully expanded and hasn't grown since.My other is having the same problem.What could be wrong?Water perimeters a great and so is everything else.Any and all help will be appreciated.Alex

 

[ags]

don't know where you have it located in your tank but once i moved mine towards the top of my tank mine opened up a ton and began splitting.

 

[worm]

mine too, Ags. i moved my closer to the top of the tank and now they are walking off the rock i purchased them on. and yes, like golfish said, they'll be a time when you want them to stop. but i want mine to walk on my back glass. wouldnt that be sweet! to have red and purple mushrooms growing on the back glass!!