Dennis, I've got 2 toadstools that are doing really well. They like alot of flow and top of the tank. If it's on a plug, just glue the plug down...if he's not on a plug, just kinda wedge him into the rock, if it's happy there it will attach to the rock. If you keep them in higher light higher flow, they'll not only open up, they'll grow nice and big and relatively quickly.