Considering its been in my tank for at least 5 months now if not longer that was the last time any rocks or coral were added to my tank I haven't noticed any loss or bites on any of my fish, other inverts and shrimp I am willing to leave it in there and this is the first time I've seen it to so as I said no telling how long it's been in the tank
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 My aquarium is nothing but a smorgasbord for my cats.....
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