Fish compatible with Bubble eyed goldfish?

i know they have real bad eyesight, so i wanna get a tank buddy who will be good with him/her. i have one bubble eyed goldfish [fancy goldfish?], and i wanna get 1 maybe 2 more fish to be it's buddy. what fish would be a good tank mate? [more bubble eyed? maybe a moor or something?] and how many... show more i know they have real bad eyesight, so i wanna get a tank buddy who will be good with him/her. i have one bubble eyed goldfish [fancy goldfish?], and i wanna get 1 maybe 2 more fish to be it's buddy.

what fish would be a good tank mate? [more bubble eyed? maybe a moor or something?]

and how many gallons would i need? right now my bubble eyed is in a 2.5 holding tank till i get more~
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