In referring to actually slicing the nennie in half with a blade.
See guys doing it over seas. Similar concept to fragging or slicing mushrooms.

I have 5-6 different species not to mention several of the same species. (At least a dozen RBT). In addition I have at least 3 different species of tube anemones and have never had any issues. All are very happy and thriving at various levels in the tank. Feeding regime is ad hoc. Larger ones get hand fed about once a week and small ones feed naturallyMultiple anenomes of the same genus IE:BTA will be fine in the same tank? No chemical warfare?Also i have read you should feed your BTA and you shouldn't, what are you guys doing when it comes to feeding?
A few pics attacchedForgot to add- the long tentacle and inferno have had a fight, inferno won, after causing notable damage to the tips of the long-tentacle I moved the conch that the long-tentacle is attached to, to prevent tentacles from touching when fully extended. IMO different species can be kept, provided that they have enough space. I would never attempt to manually propagate, have seen videos and it just looks unnatural. All of my nennies seem to like medium to low flow. Target feed Hikari coral food and reef roids once in a while, other than that the nems grab whatever they can find and the clowns that host the inferno purposefuly feed it bits of frozen food every second day. I run 4x52 Hydra LED’s which really make the colours pop!