We didn't change water daily, we didn't change all the water at a time and for a cold water fish, we did as best we could to keep the temperature close. He never showed signs of stress that we saw. And remember, what is known now was not known in the '60's. That said, I did ask an old timer recently at the aquarium specific store about the goldfish that pet stores stock, with about 50 fish to a tank & he told me those fish usually don't live long at all in a bowl, so I think 9+ years for ours, was quite good. We were kids, won a pet store fish at the fair & we did as good as we could for back then & he seemed fine. So I have no qualms about our Goldie. We gave him a good life as I'm sure he would have not even lived 9 years with someone else.
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