How many fish is considered "Overcrowding"?

  • Thread starter Thread starter Zoe Ripper
  • Start date Start date
Z

Zoe Ripper

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I have a 20 gallon tank, with 2 black moors, 1 fan-tail, and 7 very small goldfish.
Is this to many fish?
or could more be added, and if so, how many?
 
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