Bristlenoses are very easy to breed. Just put a male and female together and boom, tons of fry. The variety found in the aquarium trade has been bred beyond any specific water parameters, so breeding bristlenoses doesn’t warrant altering the parameters for success. You’ve a good batch.
Breeding bristlenoses is very profitable. What are your plans for the little guy? In fact, check for more fry. There’s likely hundreds of them hiding somewhere.