I have a frogspawn that has been doing well, going from 2 heads to 16 or so in two years. Recently, one of the heads has started to peel away from the stalk. See the pic. The head is still attached to the stalk by a thin piece of flesh, but has otherwise peeled away. None of the other heads seem affected (yet). Any ideas why this might happen? There's nothing in the tank that would nip at it as far as I know.
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