Here is something I don't think was covered in the cast. I have these flatworms in my tank, and I was just following up to ensure that they were safe. I see them at night on the glass moving around. I don't see many, but I do see them. After looking them up at wwwWetWebMedia.com I find that they are a copepod eating flatworm and that they are harmless. Well unless you are a copepod....
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