Comet goldfish tankmates help!

[Cam14]

I have a comet goldfish about one inch maybe alittle smaller in a 40 gallon. looking for some tank mates willing to size up when goldfish gets bigger any suggestions?

 

[CrackerboxPalace]

Generally goldfish are best kept in a species only tank, but you could consider a bristlenose pleco. They are okay to be kept in the upper ranges of goldfish temp around 73F or so.

 

[Sewerrat]

Could try a loach

 

[jtjgg]

goldfish are social, i would recommend another comet.