How many fish is in the tank ?
In fact, I think, if the paro male has accepted one cave, it could confuse him if theres more. There is no need to have several options – as long as he does seem to have picked one out.
About hatching and so …
Plus – minus – the eggs will hatch in about 2 days, – and the larvae will develop for about a week more, hanging in the nest. The larvae will stay in the cave after free swimming stage for a few days .. depending on individuals, or on the cave. After this the male will loose interest.
Its really difficult to say much about feeding – at least I am unable to – once the free swimming fry has left the cave I am totally unable to spot them for weeks, – maybe others have experience with intensive breeding where they follow the fry more closely, – but in my tanks, – they dissappear.
I feed – a little bit randomly – in the beginning with paramecium, – infusoria – or in fact, if the breeding takes place in tanks which are ‘old’ and settled, and where by itself small organisms are available, I might not feed the fry really. Quite often I dont know if theres any fry present, so I dont feed, – but they find food anyway. Until suddenly they appear feeding alongside the adult fish when I feed artemias.
But if I know theres fry, – I will feed the paramecium for some time, – at the same time as there are adult in the tank, so also feeding artemis. I will maybe after a week feed a few times with microworms, – or vineager eels are a good alternative.
But its hard to say precisely, – I cannot, – maybe someone else can. And it really is difficult because you don’t know for quite a while whether any fry has survived or not. They are simply too small and so good at hiding in the smallest bit of dust or gravel.