Mixing Tropical with Gold fish

[smartcard]

I have a 28 Gallon tank with the following fish:
1x Female Guppy
2x Male Guppy
2x Glass Fish
2x Neon Tetras

They all live peacefully and enjoying their stay. Today one of friends son came with a Goldfish and he wants us to put it in our thank.

Is it safe to mix my fishes with one Gold fish?

 

[The-Wolf]

No!
Goldfish are coldwaterfish, also goldfish can carry diseases that are fatal to tropical fish.

 

[black angel]

also,goldfish are very quick and will eat the small fish.

 

[PaintballFan07]

goldfish also put out alot of ammonia

 

[canarsie11]

Not a good idea at all, I say get goldfish a new home