They'll move on their own accord if not comfortable; one of the more mobile anemones you're going to find. The most important consideration is that they like to have their foot entrenched in crevices.
Bubbling tips isn't an indicator of health, but as an anecdote, MH users report higher frequencies of bubbling tips than non-MH users. I have, in the past, kept several BTA's that never seemed to want to bubble yet continually grew and divided.
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This and that.
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