I also have wondered about this. I set up my first marine tank when I was living in Beijing, China, in 2009, and I had very limited experience. I bought a green gigantea for around 40USD, no any treatment done, and the anemone remained alive, until I sold it when I had to move house again in 2010 or 2011. Looking now at the few photos I have of this tank, I see it was probably stretching for light, but never had any issues with bacterial infection. At the time there were plenty of these anemones available in beijing. They usually were all looking quite good in the shops. The blue and green ones went for about the same price. I guess they were sourced somewhere on the southern shores or not too far away, maybe Vietnam, and arrived in ok condition? Cant remember having seen any haddoni at that time in Beijing. Just remember the very tiny shops with tiny aquariums , some of them filled to the brim with several green and blue gigs. However gramma Loreto you could not find there at that time … I remember having searched a long time never found a gramma Loreto. I wanted a gig again in my aquarium when I restarted in 2019, but was quite worried reading about all the problems people were having with new gigs. This did not match my previous experience in China.