Just a little FYI ...
If you get/have a hammer, frogspawn, etc that seems to have died off (loss of tissue), never throw it out too fast (unless of course it was badly diseased).
When I acquired a 75g tank (and all it's livestock) in May '06 there was what I thought was a frogspawn with 3 live heads on it. I guess from all the stress of the move, those 3 heads all lost their tissue within the first week. I just stuck the skeleton up in the back corner of the tank as an extra piece of LR and to my surprise about 3 months later I had 5 new "sprouts" starting to grow. They now look like this (and I think it's a hammer) .....

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Keri Cantrell (Reefneck) 1961-2008

"If tears could build a stairway and memories a lane, I'd walk right up to heaven and bring you home again."
Louise