I upgraded my lighting from compact florescent to led. I started off with a single mushroom frag and now its multiplied to about 12 in the last couple months. It seems like once one of the mushrooms gets to the size a little bigger than a quarter it detaches and just floats around the tank til I place it somewhere else. It almost seems like it detaches so the smaller ones under it have a chance to grow. Is this typical behavior of mushrooms?