If you can get 10 more tanks, then you can almost keep and breed most fish/shrimps.
If you are planning on only keeping your 2ft cube, then I suggest to keep fish and not breed them since generally speaking you will not have the space to grow out healthy fry, and you wouldn't want to off load stunted fry back into the hobby.
If you can find Dario Dario... let me know. I have been looking for them for years.
So yeah... I vote 10 more tanks!![]()