Is it ok to put a small goldfish (2 1/2 inch) with a big goldfish (6-7 Inch)

The small one is a black telescope and the big one is a calico oranda.

The calico oranda kind of got scared over the weekend, when I was gravel vac-ing (now he is a little jumpy when I get close to the tank) so I deceided to get him a friend. Maybe it will calm him down.

Right now the black telescope is being Quarantined.. he had 2 small white dots on him (maybe ick) so im using quick cure. (almost all gone)

-so do you think it will be ok to put him in the tank after he gets better-

As long as he is too big for the other fish to eat, I'd think it would be fine .

Be sure there are a few places for him to hide the first few days!