29g Stocking

[LavaLamps]

I'm currently working on a 29-gallon tank with a 29-gallon sump/refugium. I'm estimating it will have 50 gallons of water volume. Right now I'm thinking about putting two telescope butterfly goldfish in the display. I don't think water quality will be a problem, I'm using 3.5 gallons of k3 fluidized media and a refugium in the sump to suck up nitrates and plan on bi-weekly water changes. My main concern is space, do you think 2 butterflies will have enough room in a 29 or should I just keep one?

 

[TheFishGuy1999]

just one i recommend because 2 would be pushing it sorry to say

 

[WildFish99]

Why would 2 be too many?
My understanding is you generally want 10 gallons per goldfish. With 50 gallons of water getting moved wouldnt that put the max at 5?