I don't know, but I have to say a few things...
Your tank is overstocked, 55 Gallons minimum for Angels. It might make your tank have a mini-cycle, or even an ammonia spike.
Did you even QT them? You risk contamination from them to your current fish.
Over hundreds of bettas die in their small, dirty cups each day. Only you can help them live. Research and then save them, today!