well this weekend i will be getting some xenias but i have to remove from back of tank it is glass what whould be the best way to remove them from glass and re attaching them to rocks or rubble. with out hurting them.
Use a new razor blade and just scrap it off the glass. Attach the new frag to a rock or piece of rubble with a rubber band. It should attach itself in 2-3 days. HTH