Angie wrote:
I've had feeder goldfish live for several years, and they never got more
than 1-1/2 to 2" in size. I had these both in 10 and 20 gallon tanks.

So what about White Clouds that the OP?

Angie wrote:
I've had feeder goldfish live for several years, and they never got more
than 1-1/2 to 2" in size. I had these both in 10 and 20 gallon tanks.

This is so sad!
You most likely didn't realize what you had done.
Hopefully after you learn this, you'll never do it again and warn
others to not do so either.
By keeping those "feeder" goldies in a 10-20g tank for years, and them
not growing more than 1-1/2 to 2" long, you stunted their growth. Their
internal organs also stunted and this is why they died so soon. Several
years may sound like a long time to you, but it's a shorted life span
for a Goldfish. Goldfish live around 20 years if kept under proper
conditions.
"Feeder" goldies should be kept in 15-20 gallons PER Goldfish in order
to atain proper size and live out a natural life span. Also, very clean
water and a proper diet rich in plant matter is needed as well.
Think about your 1 1/2" to 2" Goldies and know they should have been
16" long if they had been properly housed.
Please do not ever recommend Goldies for a small tank in the future.
It's inhumane.