Happened to me, too. Had a large beautiful sabae, hosting a pair of clowns, did great for two years plus, then, inexplicably, got itself sucked into my MP40!!
Many extractions over the next few days, it got too damaged to live.
Trying another BTA, just because my clowns were slowly killing my once beautiful ball of Duncans. I stuck it into a few large pieces of LR, almost burying it, with a few holes allowing the anemone to peek through. So far, since the FF4, it is attached, and looking fine.
Usually this will do the trick, and it will crawl around inside the pile of rocks until it finds the orientation that it likes. The rocks will have to be good sized, and the nem in between several of them, like building a cage. You won't kill it if you are careful in your rock placement. This works for me every time. Now, all I have to do is to keep it there for more than 2 1/2 year!
Good luck!
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