if you put a good glob of superglue on the frag mount...it will skin over once it is in water. When you push that glob on the rock you want to mount the frag to, it will break open and stick. This should harden almost instantly if not within 10sec. Mine have stayed without any issues. Maybe you're not using enough superglue gel? I usually use about 1/2 a small tube for each frag...sometimes the whole tube if it is a large frag/colony.