I dont see why he can keep so many species of hammers and torches yet it would seem dangerous to keep an anemone. A palm sized one would do nicely, just throw it to the bottom it will make its way up to the rock it wants to attach to.
From what i can see bro colin's seio is very high up and he only has 1 at the side. Best way to settle an anemone down to its safe nesting spot is not to force it to an area u think u want it to be. They will choose where they want to be, usually near an area with sufficient water current and light. When u keep one the first few days gotta monitor it closely, it gets too near any choppers just move it away again til it finds a spot which u feel is safe enuf then leave it alone.
Lastly, i find a lot of ppl like to use the seio with the safety casing removed for the wall camera method usage. Anything can get sucked by it easily not just anemones, i have stopped using the camera method and installed the casing. The wave maker takes up lesser space and is much reef safer with the casing. A little head loss but no biggy thats all. Thats the advantage a seio has actually as compared to a tunze streamer, just dunno why ppl dont want to use it lol.