Coral propagation doesn’t have to involve actively cutting coral fragments and gluing them to frag disks. Instead, it can be a very passive process. If you have a coral that’s growing too large for it’s rock, simply place other smaller rocks under and around the colony. As the coral grows out, it will encrust onto the smaller rocks and frag plugs nearby. Once the coral is attached, the plug can be broken away leaving behind a small encrusted frag. At this point, a new plug can be inserted under the coral. This method may not give you the tall frags that hobbyists typically pine for, but it will result in a fully encrusted coral frag that didn’t undergo the stresses of being cut and glued.