is my tank over crowded?

Question
hi, i have a, i think, 55g tank and the other week we bought five green puffers, 2 black fin sharks, and 4 mollies, all of wich are under 2 inches. im concerned about my tank being over crowded. is it?

Answer
Hi Breanna,
  Your problem is not so much about over-crowding as about the particular fish you have. Puffers do not play well with other fish.  In fact, a puffer will typically attack and eat other fish. They usually start by biting off the fins and then it gets worse from there.  I would never put a puffer in with any other fish.  You have 5 puffers so I don't think that your sharks and mollies will last long unfortunately.

-- Ron C.
  rcoleman@cichlidresearch.com
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