size

Question
what size of an aquariam is require for the 5 pairs of goldfish .

Answer
5 pairs? or 5 goldfish?


5 pairs of goldfish would mean that you need a 300 gallon or larger tank to accomodate them as they get a foot long and require 5 gallons per inch of them.
For only 5 goldfish....not 10.You can put them in a 150 gallon aquarium.