Steve S- So you recomend placeing a stressed frag thats releaseing toxins into a less filtered and smaller water volume enviroment with other corals also at delicate/stressed times? And to top it off, giving them new water parameters, lighting, and flow to get used to in this new enviroment? And yes, in this case with this leather I dont think you could kill the mother or the frags if you tried, so it wouldnt matter (like I mentioned above). Seems like very bad form to me.
This is Anthony Calvo's advice with reguards to leather fragging.
"All propagation is best conducted in a dedicated basin or remote aquarium to isolate the noxious compounds produced by corals under duress. Temperature stable (heated) water baths and holding tanks are necessary for extended periods of work. Let me be clear, too, what I mean by "heated" water baths. I have been kindly reminded by my friends and the science editors of this format, Borneman and Shimek, that from the fields of scientific discipline, a "heated water bath" is an inhospitably hot environment in laboratory applications. From an aquaristic point of view, however, I mean only to suggest that the bowls or other prop vessels should not remain unheated if procedures will take more than a few minutes. A sharp temperature drop can be very stressful for marine life as many folks are sadly aware from experiences with receiving shipped animals. So, for the purpose of this article, let me proffer that any reference of mine to a heated water bath refers to a larger vessel in which the prop buckets or bowls are immersed; the water in said vessel is to be heated with a thermostatic aquarium heater to maintain a temperature similar to the system from which the coral was taken.
The propagated parent is to be returned to the aquarium system in the exact same place and position that nurtured it prior to the farming technique. A run through a series of holding baths for the purging of mucus and noxious compounds prior to reintroduction is recommended with propagated coral. A small amount of iodine may be added to the bath water with the hope of antiseptic benefits (one drop of undiluted Lugol's iodine per five gallons of heavily aerated water will provide a solution for short baths of ten to fifteen minutes for coral). All bath water is to be discarded. The fragmented divisions may then be placed into a rubble trough for natural settlement and growout, or secured individually.
Ultimately, there is no single, ideal technique or size of division for severing tolerant soft corals and reef invertebrates. For producing a second, full-sized clone of a soft coral in the shortest possible time, a longitudinal or transverse cut may be employed. Basically, a "Leather" coral, for example, can be cut exactly in half lengthwise to produce "mirrored" divisions, or transversely by removing the capitulum with a small portion of the stalk. In the case of the latter, the headless trunk will heal and begin to form new polyps and a full capitulum within weeks. The severed capitulum will attach even sooner with a proper securing technique. Such decisive action produces two full sized colonies within months; it is a process that would otherwise take small fragments the better part of a year or more to realize. The harvest of smaller fragments is generally safer for donors, however. The longitudinal or transverse split of a coral is somewhat more of a risk. After any act of fragmentation, success may be assured if the participants show no signs of deteriorating tissue (necrosis) within several days to a week. Indeed, pathogenic conditions are expressed and develop quickly in such cases rendering infected tissue effectively into "mulch" in a matter of hours (that is to say, a rotting pile of tissue... which is more like compost, than mulch, on further consideration <G>). As an illuminating bit of humor for the new coral farmer who is concerned for the piqued, polyp-less state of a freshly propagated coral, I offer the following wisdom: if you are not sure if the fragment or parent is dead or not... it is not dead! Within hours, a dead octocoral transforms into a dissolving, foul-smelling slurry. Let there be no doubt that such an animal is dead, and be sure to remove any dying coral promptly! It should go without saying that the handling of any living coral tissue in aquariology should be kept to a bare minimum, and conducted with a gloved hand as often as possible.
That entire article is great, and gets pretty advanced with fragging technique. Good read for anyone.
http://www.reefkeeping.com/issues/2002-06/ac/feature/index.php