No goldfish are coldwater and cities are tropical their waste might even kill the copies hop this helps!
Oh just watch the ammonia and nitrates
I know Panda Cories are fine in cooler water. Most are, in fact.
You would only want to keep them with fancy goldfish though.
I think you probably are not going to find many other goldfish keepers mixing tropicals and goldies in the same tank.
What size tank do you have? If your goldfish aren't fancies, are you keeping comets or commons in an aquarium?
One common, and one comet in a 20Gal, they're not big yet... but by summer I'm thinking of getting a 29 Gal and adding a loach or a shubunkin.
Oh good heavens.
If you are going to upgrade and add another fish, then you need to go straight to a minimum 100 gallon, and a pond would be better.
Comets, commons, and shubunkins each need at least 50 gallons per fish.
When I first got into the hobby, I had 2 common's with 3 peppered cories in my 28. They did just fine, I kept the temperature at the higher end of the goldfish's and they did fine!
I only had them together for 3 months before rehoming the goldies though. I knew the tank was too small for them so I sent them away to a friends pond.
Wow haha, I honestly don't have the space for that. I thought that type of space was for bigger Goldies and kois.
Bigger goldfish ARE commons, comets and shubunkins.
It would have been so much better for the fish if you had done the research prior to buying a tank and plunking them in. I may be wrong, but I suspect you do Google searches for all sorts of stuff every day.
That would be correct, one my son won at a bazaar, and the other I bought to keep the 1st company. They went from a 1/2 gal to a 2.5 gal to a 10 gal to a 20 gal. I do use google but decided this forum would be interactive and more informational for this sort of stuff... with that said, I'm really leaning towards a 55 gal but that's all I would have room for.
Then you really should rehome these fish to a pond, and get 3 fancies after you cycle that 55 gallon tank.
Well I don't have a pond, and I don't like "fancy" Goldfish, so I can't see that happening.