20 Gallon Aquarium

[Questions?]

my 20 gallon aquarium has been running for about 10 years
right now there is a male GBR, female betta( they are doing fine together and ignore each other),2 cory cats.
i will most likely be moving the corys once i get more(into a different tank)
it is a mix of gravel and sand substrate, has a heater and a 30gal filter(something like that)
What other fish can i add in there?

 

[crazyforcordoras]

Wich do you want? GBR, or betta? Gbrs need warmer waterthan most other fish tolerate. 80-82F 28-30C.

Gbr tank
2 GBRs pair
10 cardinal tetras

Betta tank
1 female betta
4 Pygmy cories
6 Glowlight tetrad

Sorry that you can only keep one.

Just notcied you were getting another tank! Cool! You can keep both!

 

[Questions?]

ok, once my other tank is cycled i will add the bettas, but i do not know where to get pygmy cories and i don't relly wanna buy them online so i might have to ask my LFS for a special order, but the other ank is a 10 gallon so will that work? it has 2 filters if that helps