How many fish can I add at one time?

I have a 10 gallon tank and I am upgrading to a twenty. I have 2 albino Corys and 4 gold skirt tetras. When I get the 20 gal up and running and put the fish in, could I add all the fish in at once?

I know that sounds bad, but I don't want to separate the tetra and stress them. PLEASE help me out.

Also, I want to add more fish to those 6(when in the 20 gal). I want to add a couple more tetra and corys. Could I add a betta? Any suggestions?
 
Back
Top