The first two frogs do very well in groups OF THEIR OWN KIND and they're very active and bold. They're so much fun to watch. That being said, they should be kept apart fm other species. Inter species breeding (hybridizing) is very frowned upon in the dart frog hobby. Most of the offspring will be born with various defects if they even survive. Many will be born infertile and no one will want the offspring.

Each frog you have there will readily breed often given the proper conditions( temp humidity and good cover). You'll be very happy with them. I am pleading with you, however, not to mix them in a tank. They are indigenous to different areas in South America and aren't going to do well together.

People that do mix species, have a great deal of experience with darts and mix species that come from similar areas in the wild.

Basically, MIXING IS NOT FOR NEW DART OWNERS! Did I mention please don't mix them? Please don't.
welcome to the forum. If you need any advice, please don't hesitate to ask.