A query 4 u...?

how many pingpong goldfish can fit surrounded by a 15 gallon tank lacking aerator? How could you identify the male from the females while they are still juveniles.?
Answers: 1 fish, you own to figure the full-grown size because they don't stay babies forever.
The only opening to tell masculine from female (in koi and regular goldfish anyway) is surrounded by the spring, breeding age fish, the males get white bumps on their gill flap and the females hold large bellies.
They hold to go through a cold spell to know how to breed, like an outdoor pond, and from everything I hold read, the fancy shaped goldfish do not do well surrounded by an outdoor pond.
1 goldfish needs 10 gallons of hose down

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