Look for the following symtoms.
1. The anemone is not attached to anything
2. open mouth or protruding
3. non sticky factor ( use a pair of tongs and some food if it doesn't stick thats a bad sign).
4. poor coloration
5. odd signs such as should have long tenticals only they are short and listless, not reaching for the sun so to speak. Limp.
6. look for signs of melting.
7. Look to see if other corals for instance frogspawn look normal if not this may be a sign of toxins in the water colum. A carpet anemone that releases its toxins have been known to kill the frogspawn corals.
There are other signs but they just aren't poping into my head at the moment. I should write these things down. :notsure:
Thomas :sleepy: