🙂 Sounds as a really good start for you. P. nagyi is a wonderful species. What colour is the coloured band in the tail ? There are two possible colours with p.nagyi – bluish or totally white ?
I am only a bit curious regarding your tank size – 10 liters to me is enough for a pair of paroes, and also even for their offspring for a while, but for 3.3 I would not think it to be enough.
At least you will definitely face some problems regarding fry growing up and you will also have to be doing really good waterchanges to keep a good quality of water.
Also I really wondered about the b.hendra and b. tussyae, – do you keep those in 10 liters ?
I have b.coccina and they do much better in a bigger tank, – mine is in 60 liter for 4 🙂