i've done a bunch of reading on the anemone and their tentacle, but the opinions on why they are the way they are, are about as varied as people's opinion on why they split (naturally).
they may be all right, or all full of it.
personally, i think it's the flow and parameters.
my RBTA was stringy and grouchy most of the time in the nano, but in the new tank, with much better blow, it's HUGE and colored up and bubbles in the middle of the tentacle pretty nicely.
oh, and it finally split!