Hello!

I recently picked up a pair of beautiful Blue Gularis from my LFS, and I'll admit, I don't know much about them, so I have some questions.

-My 2 killies are ~6.5cm, and in a 40L aquarium.... are they going to outgrow this aquarium? And if so, how long do I have to prepare?
-With this size aquarium, can I add a Corydoras and a couple of shrimp?

I want to try to breed them eventually but for now I just want to enjoy their beauty.

Thank you for any advice!