Another good way to frag shrooms and other critters is to use one of those suction cupped or hang on the tank breeder traps. If I frag up the high $$ ric's i use this method, but it also works fine if yyr looking to attach a shroom to some rubble. Drill a few holes the sides of the breeder cage if it doe snot have any, and place crushed coral and live rock rubble in the breeder cage, so the plastic bottom is covered. I also add small glued in plastic dividers as well, but theyare not needed in all reality. The top is usually solid or open grid, so just place shroom in the breeder cage place top on and let them in the tank. They will attach to rubble or crushed coral, and then the crushed coral can be super glued n place. I rather place things on large rocks already in place andnot have a bunch of small frags stuck all over the place, so I tend to use the needle method for most postioning of critters.