Community tank

[ga_Anna]

Hello, I have a 75 gallon bow front tank. I currently have 2 black angel fish, 1 platinum gourami, 2 rainbows, 1 polar blue parrot, and 2 small Corydoras. What else can I add? All fish have been together for at least a year except the rainbows, I just added them a few days ago. I've got 3 air bubblers, artificial plants and a few pothos. I'd like to add more live plants in the future.

 

[emeraldking]

Some apistogramma species would fit in nicely...