Set a small rock beside it, even atop part of it, and it can attach its foot to that. After that, you can move it and its rock easily. It will like moderate light, alkalinity of 8.3, and moderate flow. Think of mushrooms as flat, better-natured anemones and you won't be too far off. Don't let it attach to your structural rock, or you will have mushrooms pretty permanently on that rock. It's nearly impossible to remove them without treating the rock.