That is really wonderful news, congratulation.
I find the parvenus a really energetic little fish so I am not surprised of the behaviour.
Now you are in for a challenge though 🙂 – feeding the fry if they develop. And of course the other fish in the tank. I am not sure what you should do here. Moving the fry when they are free swimming is probably very difficult, they are very sensitive then. Is the tank too big ? Because otherwise you could catch the grown up fish immidiately after the fry has left the cave. They will hide at the bottom and not get hurt.
You may be surprised though that even with six grown up fish some fry might still survive.
It sounds like you can look into the cave which is a real advantage, because then you can follow if the develop properly. The eggs will in a few days develop little larvaes hanging from each egg and these will develop over some days, – about a week altogether – at some point they will kind of turn to horizontal position just before becoming free swimming. Depending on the cave, they will either stay in this for some more days – or disappear out. I have one cave which is too ‘open’ and the fry dissappear immediately, but most times they stay.
You should think about food now, thats for sure. Do you have any experience with infusoria ?
I have some tiny infusoria which I keep as a culture, thats quite helpful because then I always have some ready, but there are ways to make infusoria fast. I could find some other peoples suggestions, but maybe there are some people here at the forum ??
I am not sure how to do this .. I have done it with putting a salat leave in boiled water, – it works, but I am not sure if there are better ways.
Artemia will be too big, – micro worms are also too big in the beginning. When you think of how small the fish are, well .. what do you think the fry will be .. 🙂 very small. Maybe vineager eels could be a food that could be taken, I have also used that.
You need to start it right away if you are making infusorie and you need to think how big the tank is – I think you cannot really ‘target’ the fry and feed a little bit each day, – you need to feed in abundance in order for any little tiny fry to find the food.
Have you got some dense areas of the tank where theres a lot of javamos or some peat which the fry can hide in ? I think this is important.
But tell us more about the exact tank size and how the eggs are developing …
Really exciting news !