The Link the Ingrid supplied showed 2 GF in a 20 gallon tank.

That's a 12" x 18" x 24" tank or equivalent.

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BEE keepers. Keep bee hives in strawberry fields to get jam
instead of honey.
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"Solomani" wrote in message
m...
10 gallons per goldfish with a 20 gallon minimum.

So unless my math is off thats 30 litres per GF. Thats a lot of water.