Suggestions For A Centerpiece For A 20 Gallon Long.

[eaglesaquarium]

If you mean "rehome", then I would suggest yes.  Not only are they going to be too large, they can also be aggressively territorial when they get older...  And, IMHO, territorial aggressive fish can be more so, when improperly kept (both in numbers and size of tank).

 

[Jack.s]

how do i rehome them?

 

[eaglesaquarium]

You could take them back to the LFS.
You could take them to a local club meaning.
 
Full members of the site can offer them in the classified section.

 

[Jack.s]

Would a pearl gourami work??

 

[Garbolino]

threadfin rainbow fish?

 

[eaglesaquarium]

Would a pearl gourami work??

 
http/www.seriouslyfish.com/species/trichopodus-leerii/
 
This will help you draw your own conclusions.

 

[Jack.s]

Are they hardy?

 

[eaglesaquarium]

Fairly hardy.

 

[Jack.s]

threadfin rainbow fish?

are they hardy?