How Many Fancy Goldfish In 55 Gallons?

[LoachLover!]

I have an approximately 55 gallon aquarium.  It has a Fluval U4 Internal filter and an APS 1400EF external filter also.  
 
I am finding I am spending too much time and money with no really good results on the planted aspect of my aquarium (currently tropical freshwater) and I am having issues with bullying as well.
 
Anyway, I am going to be changing it over to coldwater and am planning on keeping a few fancy goldfish...
 
What would be a good number for ADULT fancy goldfish in this aquarium?

 

[Lillefishy]

I'd say no more than 3

 

[KirkyArcher]

2-3 Goldfish

 

[Wildbetta]

I would go with just 2 and make sure you have good filtration

 

[ncguppy830]

yea 2, maybe other coldwater species like white cloud although there more subtropical they do fine in room temp